Malicious PDF — malware analysis report

Static analysis result for SHA-256 5532246a6feddb6c…

MALICIOUS

PDF

91.5 KB Created: 2021-06-13 16:02:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: e2e363b3143cf10bc11c2a48257129ed SHA-1: c698efb89e51115ee4f82981889e8aeb6b32d5af SHA-256: 5532246a6feddb6c32440a2ce2b17b729e0123d168affef942a5e27337462aa1
156 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of a "PDF_SEO_LINK_FARM" heuristic suggests the document is designed to host or link to a large number of external resources, potentially for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing or malicious content delivery scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://bologen.ru/123?utm_term=the+informer+trailer+music PDF link annotation
    • https://static.s123-cdn-static-d.com/uploads/4470821/normal_60aff4c25104d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452594/normal_600ecc6772be1.pdfIn PDF document text
    • https://zanewodibamejat.weebly.com/uploads/1/3/0/9/130969445/6d4ec5043a7.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4477630/normal_60b56e57b0dea.pdfIn PDF document text
    • https://kavikazu.weebly.com/uploads/1/3/5/3/135392310/kawoke.pdfIn PDF document text
    • https://gejodaxavusaw.weebly.com/uploads/1/3/4/7/134708791/1804446.pdfIn PDF document text
    • https://masodorenos.weebly.com/uploads/1/3/0/9/130969057/zaleperob_nubadewot.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424364/normal_603802fb386bf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/a07c5f48-16b7-441f-bc05-bdf41c20ffd8/bose_companion_2_computer_speakers_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e2353a0-d80a-47cb-b9b7-26a56c257577/33211172034.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/babb51cd-08fb-4c52-8097-85ce0d9c8c98/razizajobeze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5f78e6b-1364-4a9a-a4fd-823e335b4903/how_to_use_a_pure_enrichment_diffuser.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1534cf27-2673-4056-b9ac-6d1f5314106f/serie_la_biblia_capitulo_5_y_6.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/265a4fcb-5ba0-4bc4-9e08-14f16255aab5/beats_studio_3_wireless_best_buy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa449348-773a-4250-bff0-5bd7a6450742/20468884384.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b69c890-6cc7-4adf-b195-8d66d4aebb27/facebook_friends_mapper_chrome_extension_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d92ce9ab-9b93-4d24-8114-c9bcf3a3b106/whirlpool_duet_washer_wont_start_just_clicks.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/faef018d-da09-4525-b38e-1a59c8693e90/how_to_mix_sand_and_cement_for_bricklaying.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a1ada9c-ad0c-4b62-a10e-db8d13e52709/what_is_the_difference_between_3nf_and_bcnf_explain_with_example.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/222462d6-e5b3-4005-a38c-2bdce33df401/the_great_i_am_lyrics_and_chords.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48b4276d-b04f-41ac-9c81-50891235b8bf/bipefuxo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34b53d34-ab38-408b-9443-b7b752946d08/zebra_zt220_not_printing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4947245d-6017-4643-90dd-22cef8cede7d/gasejawomen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25efe885-49dd-4777-82a1-7b98541d0998/mukesiminetar.pdfIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010013.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10013 4952 bytes
SHA-256: 3e61f638c9bd1d582318d02d518d6e0ff6aa62e323ae78bff15af488f2783040
font_01_sfnt_off000110ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110AC 11444 bytes
SHA-256: c4a235452d5d379c7975f33e7ca2e82300098a053acb7d749bfa296f1ffc6d23
font_02_sfnt_off000137c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137C9 17616 bytes
SHA-256: ac3eb12e6d18022c6f7985e3d23df82ffce188cd543a759128b14b1e40b799fe
font_03_sfnt_off0001522c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1522C 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176