Malicious PDF — malware analysis report

Static analysis result for SHA-256 835f48428084e7c7…

MALICIOUS

PDF

76.5 KB Created: 2021-06-01 10:46:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0795b477ab6b8dd9dbed9f8cea7463f8 SHA-1: 3bd18af2877cc7b56200cb0d1e52cfdeeb0d1d5a SHA-256: 835f48428084e7c7bd9310ea291663809e5c435f6b4fc7c9fdc5982c1f06216e
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to seemingly unrelated content, suggesting a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as phishing. While no scripts were directly extracted, the PDF structure and numerous external URLs are indicative of a phishing or malicious redirection attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://crysiq.ru/pbw?utm_term=louisiana+mushroom+identification
    • https://fitarobut.weebly.com/uploads/1/3/4/6/134690469/9549971.pdf
    • https://dufibivi.weebly.com/uploads/1/3/5/3/135346242/8c895ff.pdf
    • https://sabigakubotel.weebly.com/uploads/1/3/2/7/132740275/cbb7e6e0178b654.pdf
    • https://fedubipogumuwu.weebly.com/uploads/1/3/1/3/131379546/dulegopupuvesid.pdf
    • https://pegalidaxib.weebly.com/uploads/1/3/4/6/134632492/148526.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/d59d6870-1820-42f3-b48a-9c021e6ff347/banekenumaj.pdf
    • https://uploads.strikinglycdn.com/files/9cd0a998-a4d0-47cb-98d2-311e4019c899/linoleum_block_printing_lesson_plan_high_school.pdf
    • https://uploads.strikinglycdn.com/files/a21d2635-26d9-4fbd-9a3b-99ca23da1373/51064425739.pdf
    • https://uploads.strikinglycdn.com/files/12afaf7e-b027-46e7-97a5-1210214dc61e/come_as_you_are_book_nirvana.pdf
    • https://uploads.strikinglycdn.com/files/54b3d3f0-414a-43c4-9c50-9b6e5ee0551f/duzafuginufotulekezar.pdf
    • https://uploads.strikinglycdn.com/files/ab060dbd-5181-43d6-a88a-77f1459c4f13/37283111237.pdf
    • https://uploads.strikinglycdn.com/files/734887a7-c92b-4c96-aab2-bb5b9545868a/mantenimiento_preventivo_a_un_motor_electrico.pdf
    • https://uploads.strikinglycdn.com/files/3b65299b-a4f5-4141-a40d-fd1b6b2bbba9/58857734007.pdf
    • https://uploads.strikinglycdn.com/files/4c1163bd-34bf-4f5c-877b-f95f5b40c7f0/how_much_is_a_65_inch_sharp_tv.pdf
    • http://pusavivo.pbworks.com/w/file/fetch/144448251/netflix_for_ios_9.3_5_download_apkmody.pdf
    • https://uploads.strikinglycdn.com/files/ed9f41f3-3b38-4fea-8353-70daec6fb3ab/77433789522.pdf
    • https://uploads.strikinglycdn.com/files/9bf146ee-1d22-4c25-bf3a-4a45a9a9bc17/how_many_miles_is_lake_hefner_okc.pdf
    • https://uploads.strikinglycdn.com/files/0885f493-b477-4101-9068-aa42e796f566/kuwud.pdf
    • https://uploads.strikinglycdn.com/files/3c5c4eb3-0e8e-448c-b09e-a480773c92c3/16732942248.pdf
    • https://uploads.strikinglycdn.com/files/157867f9-c7e7-46f3-aabb-e5674d4f3a0d/bear_archery_approach_vs_cruzer_g2.pdf
    • https://uploads.strikinglycdn.com/files/eda368e4-78a9-42fa-90bc-16986a349abd/6706234156.pdf
    • http://xuruzinijub.pbworks.com/w/file/fetch/144423399/15552984218.pdf
    • https://uploads.strikinglycdn.com/files/685da772-24df-42e6-bdf2-becee130efe4/51183537981.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed07.bin
a726015facfa839435bb32167864fc34e01d2e6fea9bf62b3bac218e06a46e51		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED07 5172 bytes
font_01_sfnt_off0000fe72.bin
96706ca33c82f09d00f87d63329796249ed137bdee9a2b8d0a1e6dcadc47864e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE72 11044 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.