Malicious PDF — malware analysis report

Static analysis result for SHA-256 a036a3bfb04aff41…

MALICIOUS

PDF

116.6 KB Created: 2021-05-24 11:10:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a278263634e4e5916a642cdcb69fc07a SHA-1: 84e9b71d960a5ad9ef4611217ce1c1ed078f8f8f SHA-256: a036a3bfb04aff4151198f714e0cf8301664f835e93630071c32560bc14777c8
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://bologen.ru/strik?utm_term=finding+perimeter+of+irregular+shapes+worksheet PDF link annotation
    • https://memabalizova.weebly.com/uploads/1/3/4/4/134490842/basotokewu.pdfIn PDF document text
    • https://tebijiburowuwe.weebly.com/uploads/1/3/4/8/134850880/gowizokep-jawel-kufoxuxikerijaw-kuxuzud.pdfIn PDF document text
    • https://vutavapurazamo.weebly.com/uploads/1/3/4/6/134643269/porexegikakikemufip.pdfIn PDF document text
    • https://labelamujevodit.weebly.com/uploads/1/3/1/6/131606697/xotadofidovuwaroviju.pdfIn PDF document text
    • https://raxokada.weebly.com/uploads/1/3/1/4/131409035/lowekezakanakep.pdfIn PDF document text
    • https://pifabesi.weebly.com/uploads/1/3/5/9/135958575/0bb4f7f1d3.pdfIn PDF document text
    • https://jitifawe.weebly.com/uploads/1/3/5/3/135327084/famuvudexefowup_lofixulu_ropetoti_xazovuzo.pdfIn PDF document text
    • https://ramimuluvisefo.weebly.com/uploads/1/3/0/7/130775145/podewasabitut.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/nuxomigo/95766223375.pdfIn PDF document text
    • https://s3.amazonaws.com/wujixus/what_is_freedom_for_you_essay.pdfIn PDF document text
    • https://s3.amazonaws.com/jozaponi/ayyappa_bhajana_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/lewuli/memory_platform_wedge_sneaker_steve_madden.pdfIn PDF document text
    • https://s3.amazonaws.com/dufekifaral/95760202928.pdfIn PDF document text
    • https://s3.amazonaws.com/zesotat/33738467695.pdfIn PDF document text
    • https://s3.amazonaws.com/badodemebo/gigelometevar.pdfIn PDF document text
    • https://s3.amazonaws.com/zoxewudunigus/gavavogi.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxirefare/99324165324.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaduxa/how_to_reset_epass_token_password.pdfIn PDF document text
    • https://s3.amazonaws.com/fatisake/autocad_underlay_frame.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000178ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x178AD 5448 bytes
SHA-256: 1eb22700c9cc039a669c4f7a86cc29b7d65370a17749d4e9e92824d986a697aa
font_01_sfnt_off00018b15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18B15 13192 bytes
SHA-256: 09386c3466a825b2bb828480107c15cb7ee625b33ead80714d1b0c5939139578
font_02_sfnt_off0001b5f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B5F5 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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