Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fd564080b50240a…

MALICIOUS

PDF

88.8 KB Created: 2020-12-17 12:44:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: e43cafa3de6be9a6fca584610c7af1a8 SHA-1: 7d6c02fbf0f8656b6e184fad36dc44d3d642a31c SHA-256: 1fd564080b50240a5aba3b7b34352b1e114db08fce941b2478b6346ddfeb6ad0
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to Weebly-hosted PDFs, which is indicative of a link farm or SEO abuse. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffnew.ru/123?utm_term=little+chute+school+district+reopening PDF link annotation
    • https://degodowaserujes.weebly.com/uploads/1/3/4/4/134494515/ead19a4d9f.pdfIn PDF document text
    • https://tovepeluzon.weebly.com/uploads/1/3/4/3/134385389/zarunas_jugobe.pdfIn PDF document text
    • https://niwejeru.weebly.com/uploads/1/3/4/3/134308800/nixitegilamije.pdfIn PDF document text
    • https://bogadisosupotaj.weebly.com/uploads/1/3/0/7/130776541/jomurujonuw.pdfIn PDF document text
    • https://fekakekofum.weebly.com/uploads/1/3/4/6/134656499/492871.pdfIn PDF document text
    • https://pozimifekof.weebly.com/uploads/1/3/4/6/134674510/purunaja.pdfIn PDF document text
    • https://banavodix.weebly.com/uploads/1/3/4/6/134687022/8379214.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc7ad01849d1727bc13d9ef/t/5fc870a28eecd53e39eb125b/1606971556028/800_words_cast_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/fajixe/14381218597.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc648058ef7301f8b35a0c6/t/5fc7ff461096a47934a46c58/1606942536081/rust_door_controller_not_pairing.pdfIn PDF document text
    • https://s3.amazonaws.com/lawakux/die_cut_decoupage_sheets_for_card_making.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6a9a424b06a7eb327d53d/t/5fce59d283d2ac65cc45a777/1607358931030/gatugidoxes.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0ff9227a199023ab5e001/t/5fc6cccde2dcb1274ddab315/1606864077841/nuzolejokukuzit.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012006.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12006 5068 bytes
SHA-256: 987441dc7b9f9239e56f05e4bf8482af053df364371c5b3eaf9c32149276b949
font_01_sfnt_off0001313e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1313E 10792 bytes
SHA-256: 6b6485ba3ea91dee35f7f6b3ff0feaffdca179860a9151326528d0b52e2be846

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