Malicious PDF — malware analysis report

Static analysis result for SHA-256 d58f48b3f6f8bb45…

MALICIOUS

PDF

76.6 KB Created: 2021-04-09 05:30:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: e7239bd24a289a73be8d888faa3ff8fd SHA-1: 9027b5031381b1d2da6633f37a4649a3e9c412d8 SHA-256: d58f48b3f6f8bb45948bf5d84419b6df2a44b193fb5087cad56d8fd3ec586231
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by both a machine learning classifier and ClamAV. It contains a large number of external links, many pointing to disposable domains and Weebly-hosted PDFs, indicating a link farm or SEO abuse tactic. The primary purpose appears to be directing users to a multitude of external resources, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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
  • 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://lozipotod.ru/strik?utm_term=how+much+is+a+sandalwood+tree+worth PDF link annotation
    • https://sijalafad.weebly.com/uploads/1/3/4/8/134887162/budefesasilu-simori-vaxopefa.pdfIn PDF document text
    • https://kusagurapatavo.weebly.com/uploads/1/3/1/8/131871515/jizugulu.pdfIn PDF document text
    • https://varusimutajol.weebly.com/uploads/1/3/4/5/134502614/9161819.pdfIn PDF document text
    • https://dukifuti.weebly.com/uploads/1/3/1/4/131437117/sewiwodopadur.pdfIn PDF document text
    • https://xuxerativizujaf.weebly.com/uploads/1/3/1/0/131070719/bisinupuko_jiriwogab.pdfIn PDF document text
    • http://xiwaxuso.22web.org/8199603355.pdfIn PDF document text
    • http://rizovog.iblogger.org/wuvuvoxivuwe.pdfIn PDF document text
    • https://musisemikalig.weebly.com/uploads/1/3/4/6/134694348/xorakomutejifalepax.pdfIn PDF document text
    • https://sesemuxedewa.weebly.com/uploads/1/3/4/0/134017121/tawevupore-fodadibukubiw-fazudulikon-dawibivivim.pdfIn PDF document text
    • https://roguzemu.weebly.com/uploads/1/3/6/0/136018034/wasujebudebudisel.pdfIn PDF document text
    • https://dotanivim.weebly.com/uploads/1/3/4/7/134705276/rotijeg.pdfIn PDF document text
    • http://amandeepsadyora.com/11112684914koph2.pdfIn PDF document text
    • http://gexezagabakit.22web.org/9048209302.pdfIn PDF document text
    • http://changepass.online/ukulele_strumming_patterns_4_4d4fg6.pdfIn PDF document text
    • https://tavutafaj.weebly.com/uploads/1/3/1/4/131482866/da706.pdfIn PDF document text
    • http://supernefritroller.xyz/12533581719x6gu5.pdfIn PDF document text
    • http://fastcreditcheck.info/kejixumilanorepofotahj06a.pdfIn PDF document text
    • http://drnextact.xyz/chevy_cobalt_repair_costsesigj.pdfIn PDF document text
    • https://lipuguxe.weebly.com/uploads/1/3/0/7/130738524/6211358.pdfIn PDF document text
    • https://ligunetanojuwid.weebly.com/uploads/1/3/4/6/134625742/11c1a40254f579.pdfIn PDF document text
    • https://xuzekivaf.weebly.com/uploads/1/3/1/4/131453918/7663530.pdfIn PDF document text
    • https://nukusiluvo.weebly.com/uploads/1/3/4/6/134612364/4726988.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
    • http://zifezerolivuba.epizy.com/69086348704.pdfIn PDF document text
    • https://636e06b3-920c-4898-b827-ef778bbbc101.filesusr.com/ugd/40512e_52778a69cf5141b8aafa7c006aeb9a8d.pdf?index=trueIn PDF document text
    • https://2dc0326d-ac60-47d8-bf46-f2dc9d334570.filesusr.com/ugd/21b4a7_2f29d38b02824d879322aa8249e9cff2.pdf?index=trueIn PDF document text
    • https://b5f169ef-6bcf-4d19-a24b-32bdc9dd7a5f.filesusr.com/ugd/2e79a6_6f8f0c0ab9854b0a86ab9ce95e26aeb2.pdf?index=trueIn PDF document text
    • https://a9864912-ad24-422b-99f3-2d90f7703507.filesusr.com/ugd/d6af85_b71f7a6a118f40569f57c8228103d949.pdf?index=trueIn PDF document text
    • http://pojevit.rf.gd/gerezufixiweponameruta.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e03d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE03D 5116 bytes
SHA-256: eec7c68552f2d5f77df0b6faa577b25bd30fe6342a34678d452f6518911c3f16
font_01_sfnt_off0000f17c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF17C 10848 bytes
SHA-256: b67988108433c5b4e6e0859b7e3a22ed462bbad9d196e2441fb40f3df0255731
font_02_sfnt_off0001166b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1166B 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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