Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8c65577ce53b777…

MALICIOUS

PDF

79.8 KB Created: 2021-03-09 06:13:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 8ebf3461c578ec4e735aaf185442ad5e SHA-1: 887b17f762bafd5d5f6e9e7a844cd2f23a5be34c SHA-256: a8c65577ce53b7775434e61d147a399400d89aaf9f0546dfd275ee092f9f77ca
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious sites. The document body, though heavily obfuscated, contains references to 'Anthem game digital', likely a lure to attract victims.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/123?utm_term=anthem+game+digital PDF link annotation
    • https://fevobubutexub.weebly.com/uploads/1/3/4/4/134481878/xewujeko_mobekuvopukevu_falizogito_sifapuzafo.pdfIn PDF document text
    • http://douchehq.xyz/5762313065251gp3.pdfIn PDF document text
    • https://jemexegotida.weebly.com/uploads/1/3/4/4/134464186/besitetuf.pdfIn PDF document text
    • https://darefosal.weebly.com/uploads/1/3/4/6/134601331/gevamozoxijubusugoz.pdfIn PDF document text
    • http://it50save.info/9149257291081gu3.pdfIn PDF document text
    • http://baramijotafexo.mypressonline.com/best_headset_audio_settings_for_warzone.pdfIn PDF document text
    • https://buniburus.weebly.com/uploads/1/3/1/6/131637527/luneruvim.pdfIn PDF document text
    • https://karimimeri.weebly.com/uploads/1/3/1/1/131164281/92eb9.pdfIn PDF document text
    • https://jematujevuzonip.weebly.com/uploads/1/3/4/2/134235480/088b5578.pdfIn PDF document text
    • https://bigadamedoje.weebly.com/uploads/1/3/1/3/131384249/nivoko-wadalor-setigekexipev.pdfIn PDF document text
    • http://morj.space/zomekutazujiruruj9hpse.pdfIn PDF document text
    • http://micrometer25bill.site/sandeep_maheshwari_new_videov1vaz.pdfIn PDF document text
    • https://wosobariwosamu.weebly.com/uploads/1/3/4/3/134372044/04b0e89.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://fb9345b8-40be-4608-a8ff-9c5427dba92f.filesusr.com/ugd/98d639_a703039f34dd44d7bb4c698125c21c9a.pdf?index=trueIn PDF document text
    • http://kafotafuvodalix.onlinewebshop.net/56542376827.pdfIn PDF document text
    • https://s3.amazonaws.com/zobuwubedak/grade_3_math_questions_and_answers.pdfIn PDF document text
    • https://fa53e508-d88d-41cb-897c-7a5b6f1bfcc3.filesusr.com/ugd/361045_52bafc702e2643d5a41078ef4fc4e53d.pdf?index=trueIn PDF document text
    • https://51956041-da35-40aa-96c1-085c1f47c80d.filesusr.com/ugd/e6e573_9e3bcad721a34890878a24a489a753d0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/najipavez/tawatuzos.pdfIn PDF document text
    • https://0e9c393c-9feb-4465-ae9d-4486bea7a644.filesusr.com/ugd/4b68be_94fd8acae21f4fb3849b216fea0985e1.pdf?index=trueIn PDF document text
    • http://timerojulawu.myartsonline.com/9944866423.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE08 4956 bytes
SHA-256: d379c5c8074bad18c1585578d37f00985c1339152b310dbe2e6d964b76dd19c2
font_01_sfnt_off00010ebe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EBE 10296 bytes
SHA-256: 75ae59b1967c6eabfd38b57d666fc57d8dc2ec53503ca5bc14fc0cf6e377804b

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