Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ddacd243b826d97…

MALICIOUS

PDF

98.2 KB Created: 2021-04-01 22:30:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 339ba2b15cede590671b605159f58eb3 SHA-1: d5dd8d1a9edba010f0b13295f57c51508c3fbce9 SHA-256: 6ddacd243b826d976649801ad04e8304b568dc610cb2ca2d36fe5e577407ffaf
166 Risk Score

Malware Insights

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

The PDF contains multiple links to external websites, with one specifically pointing to a suspicious domain 'gratoramaa.space' which is flagged as a malicious URL. The document body, though heavily obfuscated, suggests a lure related to 'Encyclopaedia of islam second edition pdf', likely to trick users into clicking the malicious links. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://druttle.ru/award?keyword=encyclopaedia+of+islam+second+edition+pdf PDF link annotation
    • https://fanuxerejupu.weebly.com/uploads/1/3/1/3/131398214/nelewozavow_robinasedaze_tuzarafu.pdfIn PDF document text
    • http://icub.tech/7688803448bndmr.pdfIn PDF document text
    • http://kersita.fun/936968206080mbva.pdfIn PDF document text
    • http://epaytds.xyz/regasiposogezi8t8nv.pdfIn PDF document text
    • https://fotiterik.weebly.com/uploads/1/3/5/3/135328456/7342119.pdfIn PDF document text
    • https://xujokutiw.weebly.com/uploads/1/3/4/7/134749543/boxebizerap_perivaxixaw_xovakuzile_nutafilivum.pdfIn PDF document text
    • http://gratoramaa.space/giromerosarolojobonuriseklwvkb.pdfIn PDF document text
    • https://fepobiwebefu.weebly.com/uploads/1/3/4/5/134592484/kibedel_xutiwiliga_taketegojavizi.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://s3.amazonaws.com/zeworibuzoza/karokogotapiw.pdfIn PDF document text
    • https://s3.amazonaws.com/xazarujokemus/40208193463.pdfIn PDF document text
    • https://s3.amazonaws.com/benuka/64403604814.pdfIn PDF document text
    • https://3b1a0cff-dc54-4917-88c1-cdf904a8db56.filesusr.com/ugd/60aab8_1fa17176722649b8958a0996055ab57d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xeroguru/fourier_transform.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f03f5efe-a0e6-46e0-b663-3307da1f815a/burning_spot_on_lower_leg.pdfIn PDF document text
    • https://s3.amazonaws.com/fupanabivote/zuvukegataledizoxun.pdfIn PDF document text
    • https://01dc7cc6-b8ed-446e-8cc8-1ad78882ed38.filesusr.com/ugd/e23fbb_14f0d5ac80e54905a8ecea188f172856.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4e545e2-22f6-4f8d-ac1b-5fb359a955a2/whirlpool_wmh76719cs_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27dda022-323c-4afd-b0d8-bd5a7428d0b2/9_wing_chun_dummy_training_techniques.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2985339d-3b6e-4370-9898-959435558bdb/wendys_nuggets_nutrition_information.pdfIn PDF document text
    • https://8eccd3b7-fb20-4588-a5b5-4d8c58591879.filesusr.com/ugd/0e6328_6b186fba5cd943818f968b653a212c02.pdf?index=trueIn PDF document text
    • https://bf130ee1-1463-4c69-9604-1b23772ced92.filesusr.com/ugd/b4609a_a416085ec7064b7baba7549f85c8e8f3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a1ff4c6-8e33-4e7b-8aa0-0d5da8c0e8f7/tewaviloloxosolosedopewi.pdfIn PDF document text
    • https://24d1f61b-f5c5-4d2f-8180-62589f44e8d8.filesusr.com/ugd/eed56f_97018bc93ac547cab0f33cdd4b68d51b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a835187d-2dc6-4462-a9d5-6fa82198e98b/tofidukepijewixu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bcd80015-a57d-4dce-8794-8eace3d71289/victoria_aveyard_red_queen_summary.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00013fd9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x13FD9 25284 bytes
SHA-256: 500bb762a5e6827dd2e59eb65b3486c4180e3945a54967eb5b2e606a2a73ee2d
font_00_sfnt_off000105a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105A3 5052 bytes
SHA-256: 06a010f4936b9cc34f99fad8c8d0881b6d7dec2fb879e433b35896950650b926
font_01_sfnt_off000116c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116C1 13120 bytes
SHA-256: b8bf8be79716ccc53cec34c10b8660d5187d58a5cb9b6d557a10b490027a9f03
font_03_sfnt_off00016c69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16C69 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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