Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbcaa202f26a6001…

MALICIOUS

PDF

75.4 KB Created: 2021-04-06 20:47:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 983ce2a0781bdb8da09a57c75938aefc SHA-1: db26a1279647829f75d612c96074d1fd6c540de5 SHA-256: bbcaa202f26a6001159c5dcd3481177c80d98b9501db97fe28a5327d11c41f57
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The sample is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to external resources, one of which is flagged as potentially malicious. The PDF structure and embedded content suggest it's designed to lure users to potentially harmful websites, possibly for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://maypoin.ru/123?utm_term=bhagavath+geethai+in+tamil+pdf+free PDF link annotation
    • http://lulilafemavivog.mygamesonline.org/lider_autocratico.pdfIn PDF document text
    • http://melowew.scienceontheweb.net/types_of_working_capital_management.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://9849c7ec-8b19-4b81-9a64-db2537ea7c40.filesusr.com/ugd/97b1c0_b0fd697651be46aa834cd5a2b64870b1.pdf?index=trueIn PDF document text
    • https://6648aa49-deb3-4d6f-81a8-a63cc7a297fb.filesusr.com/ugd/38eac1_81dcab6e9a8649e6a2feece640bfe20b.pdf?index=trueIn PDF document text
    • https://73a1781f-5c9f-4c76-8a11-a8e8c44f336a.filesusr.com/ugd/d9f7b5_e794b19e84474fa6808f80085e5ec10b.pdf?index=trueIn PDF document text
    • https://8a7e94d2-1b07-4399-8a7b-cfebf1eb419e.filesusr.com/ugd/e78b77_3f56222b1c4e43dc88f358098b2457bb.pdf?index=trueIn PDF document text
    • https://f0198b83-f3fe-41b4-8315-bacd7eabb238.filesusr.com/ugd/2b3f46_729b3d1563934d009eac6ba4bfe8477e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8cafd37a-130a-4d74-a1d0-11a60890e001/nasb_bible_translation.pdfIn PDF document text
    • http://perexuwofogefo.onlinewebshop.net/roduxovalezek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88257ebc-c4f9-4916-9bd8-f10293c9248e/ribuwigu.pdfIn PDF document text
    • https://8fc1c2d6-49ba-4d63-8b95-0327ef2b1627.filesusr.com/ugd/1849a1_6c456fc969e14b2e80868a6ffe66e54d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6736a717-1e7d-4062-a7eb-2ac7e2ac67ef/the_rime_of_the_ancient_mariner_part_2_short_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e67670a-0ba9-4fc0-8b93-7f63b469a578/sears_kenmore_progressive_vacuum_parts.pdfIn PDF document text
    • https://4910898c-6dae-4802-98be-c66cdd591ee0.filesusr.com/ugd/3283b0_7a6131c07d69475d87a157b6b28c2d74.pdf?index=trueIn PDF document text
    • https://f3dc8d0a-397f-4303-99a5-a7927e83d850.filesusr.com/ugd/e916cf_be2253f9b1be4fa1bb2405670983b2a2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d32bb4bb-5e6d-4bf9-801b-adae36f65429/tipos_de_esquemas_elctricos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5e57757-70e8-4eeb-9c13-05a1176b628e/modern_warfare_3_cheats_xbox_360_survival_mode.pdfIn PDF document text
    • https://694dae7a-2033-4a59-8b06-91ff4eec0774.filesusr.com/ugd/e1d58f_9acb487ebe4c4426ba507dd74a19cb5d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/70a077c2-576b-4a72-84fd-eb6493aea086/kelley_blue_book_value_of_my_used_car_canada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da5d7d13-083a-429b-9ebd-6f1156ecc067/fifty_shades_of_freed_movie_download_filmyzilla.pdfIn PDF document text
    • https://9a4b5e96-23fe-4021-9525-787506808755.filesusr.com/ugd/b3318b_a1abfd05aef7437daa3f2c6512584bb6.pdf?index=trueIn PDF document text
    • https://288dffde-0386-48bd-adba-b069b5f3b70f.filesusr.com/ugd/7e1b39_2f3086829fb247b8a89ff1e08009dc58.pdf?index=trueIn PDF document text
    • https://e055bcc9-c4f1-4c6c-8dcb-0912bf54750f.filesusr.com/ugd/b4a829_5720a5446eb545788933415376c7ef1c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/29a84352-1818-407f-91b2-4ec427f7576b/call_me_by_your_name_2_trailer_deutschland.pdfIn PDF document text
    • https://459fb65c-52af-4c88-885a-43a44fbeaf25.filesusr.com/ugd/6a7407_0e702c13ba8747149442e5a79c94ae66.pdf?index=trueIn PDF document text
    • https://c4bedd8b-a3e9-4aa8-9751-a6fde4035b7e.filesusr.com/ugd/037f08_5a04016806e74b0d9d65e63691c953c6.pdf?index=trueIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD3E 5388 bytes
SHA-256: 4947afc91d885bd295d8037e35f4fc9c2d5c3b85a92abaf3b1e827ba974287bf
font_01_sfnt_off0000ef72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF72 3600 bytes
SHA-256: 0acd8b80e0e140ea17d90d2492c18deffb2a0fd7432ed69fd641204d69733bd7
font_02_sfnt_off0000fc48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC48 10196 bytes
SHA-256: 20d503f922098b8131999b4dd14a0eaad577e6d6b971fbc578c0ba2c3939dbab

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