Malicious PDF — malware analysis report

Static analysis result for SHA-256 37b944f89438036b…

MALICIOUS

PDF

76.3 KB Created: 2021-03-18 16:04:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 75ca2d355de6a31d6dac46235b36b621 SHA-1: 207c970cf94403ef34d2e0a446f57ed206131320 SHA-256: 37b944f89438036b3c836a3debe24192aceb7fe19ed2ba81ef38735210fc4665
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, suggesting it's part of a link farm designed to manipulate search engine results or direct users to malicious sites. The document body is heavily obfuscated, but the presence of external URIs and the link farm heuristic strongly suggest a phishing or SEO manipulation attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • 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://ponafet.ru/wix?keyword=national+night+of+prayer+for+life PDF link annotation
    • http://duzixofiwisegi.mygamesonline.org/ielts_speaking_part_2_topics_with_answers_2020.pdfIn PDF document text
    • http://boxberry-24.cc/47882332478r6pdy.pdfIn PDF document text
    • http://tututot.mygamesonline.org/hodgdon_reloading_book_2020.pdfIn PDF document text
    • http://maddot.space/raymond_carver_short_storiesv30ep.pdfIn PDF document text
    • http://reduslim-eu.site/what_is_the_cricut_rotary_cutter_used_for4v40a.pdfIn PDF document text
    • http://reassurez-moi-fr.info/81400561349zkqxm.pdfIn PDF document text
    • http://eferevole.com/gisazuvojaradolelelibilem97eja.pdfIn PDF document text
    • http://nicepics.xyz/dagajekoxilejevajesuxexsbxkp.pdfIn PDF document text
    • http://soferijivav.getenjoyment.net/jurnal_psikologi_tentang_adversity_quotient.pdfIn PDF document text
    • http://jawixogu.mygamesonline.org/61317899406.pdfIn PDF document text
    • http://jekenufakewe.mypressonline.com/how_to_fill_up_a_ronson_lighter.pdfIn PDF document text
    • http://shoop-fk.ru/didilikifesemijpbodz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://50bf384a-eeac-4f26-a262-e2ba1a5e00ba.filesusr.com/ugd/17159d_e5916593c2e34a4e8c869b508d18ac20.pdf?index=trueIn PDF document text
    • https://e0bfa911-60eb-4c53-bd8d-ceec25156dfb.filesusr.com/ugd/0a052f_de0021ac28c54144a8517672080092af.pdf?index=trueIn PDF document text
    • https://dca540c6-954d-4243-9f09-0921753db957.filesusr.com/ugd/974a4e_17834fa5b89a4b4491c5617c30d101c7.pdf?index=trueIn PDF document text
    • https://a72a44ae-2aae-4d6a-a6c4-235301d0a62e.filesusr.com/ugd/57436b_3fbe29bd24c94b5da853eb5237ba9938.pdf?index=trueIn PDF document text
    • https://010f2e21-25ca-4560-806d-08cbbb7c7db1.filesusr.com/ugd/74a852_19cfb6cab85041a798d2c3bdafec0d51.pdf?index=trueIn PDF document text
    • https://46c19374-600d-43be-a5f2-d8bf07c6fddf.filesusr.com/ugd/cc94a4_2da1bd67e243485fb8ac5c0d9204abec.pdf?index=trueIn PDF document text
    • https://933527c5-e005-4225-a3aa-05fee46c7696.filesusr.com/ugd/b51dd5_4cf0228d02974804bf7284fbcc5f65f1.pdf?index=trueIn PDF document text
    • https://c8a164a7-2549-4056-b209-d27d417f800b.filesusr.com/ugd/136d3d_1c376eddc11449b5b2c5b5c4cc7c416a.pdf?index=trueIn PDF document text
    • https://98771922-91e4-4673-aa0d-7794f4435593.filesusr.com/ugd/b6aaa0_48c87d64ef0442fe8a44a8cde0ddd719.pdf?index=trueIn PDF document text
    • https://e46eb8ae-11b5-47af-91b5-79e2db369635.filesusr.com/ugd/f84671_d45eabfcb9bb41a2a75c60576ebf594c.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECBC 5056 bytes
SHA-256: 053ae374dd417aec09b47eb2a5115984034bf725519c26643f2ea5b25a771b89
font_01_sfnt_off0000fdff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDFF 11156 bytes
SHA-256: 884d0d254a9e1a6bcec306a882981958043bb43cf9e85d20241add8dfb43e95f