Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0e3cd857697a014…

MALICIOUS

PDF

114.4 KB Created: 2021-05-17 04:26:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 64a529114211bb5383b283da5e3dd0b6 SHA-1: df4aff9e2af92faa4caf6d5bc9bd121cd17eb335 SHA-256: a0e3cd857697a014c7edf61ac9adbb28e02075fadb8f5a9a1bc62f723d54f767
186 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 0.9974

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://resalured.ru/strik?utm_term=what+does+the+bible+mean+spirit PDF link annotation
    • https://nipujari.weebly.com/uploads/1/3/1/3/131384055/gefux.pdfIn PDF document text
    • https://cdn.sqhk.co/zesojesiwi/Cksgfgd/xukekavugefugiwibuxoke.pdfIn PDF document text
    • https://nuluvefum.weebly.com/uploads/1/3/3/9/133999802/febakuvofagiragidar.pdfIn PDF document text
    • https://dugezuwodovapa.weebly.com/uploads/1/3/0/8/130874298/burebeb-zatezokinusov.pdfIn PDF document text
    • https://teraludejos.weebly.com/uploads/1/3/5/3/135304334/eda85fc.pdfIn PDF document text
    • https://fanepolareroroz.weebly.com/uploads/1/3/4/6/134666972/xekuranas.pdfIn PDF document text
    • https://zewemoledomuro.weebly.com/uploads/1/3/4/7/134746436/f806f4356c.pdfIn PDF document text
    • http://setafugeridol.scienceontheweb.net/the_sherlock_holmes_book_big_ideas_simply_explained_download.pdfIn PDF document text
    • https://cdn.sqhk.co/modesinilofe/BhaqNEE/rts_2_hd_program_danas.pdfIn PDF document text
    • http://kanaxade.mygamesonline.org/rugiramuvalimaga.pdfIn PDF document text
    • https://wegefaraza.weebly.com/uploads/1/3/4/7/134703567/2006986.pdfIn PDF document text
    • https://wovovude.weebly.com/uploads/1/3/1/3/131397940/bawisivirefofisid.pdfIn PDF document text
    • https://cdn.sqhk.co/bekutojeke/2ggGhfu/40305430331.pdfIn PDF document text
    • http://ropisunofo.mygamesonline.org/arifureta_novela_ligera_volumen_9.pdfIn PDF document text
    • https://cdn.sqhk.co/lojosewude/giieBwl/74052393595.pdfIn PDF document text
    • https://barijenevedi.weebly.com/uploads/1/3/1/4/131438420/galaxemakuxi.pdfIn PDF document text
    • https://cdn.sqhk.co/pelopuxi/ZNiaDjg/fegezizebumugeparad.pdfIn PDF document text
    • http://namafafiteg.mypressonline.com/xuramipovegovo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ziwivazud.onlinewebshop.net/fijoj.pdfIn PDF document text
    • https://s3.amazonaws.com/divikufifir/gotizek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c058d29-053d-47fe-b5de-8fb7fa04922a/whats_your_angle_pythagoras_read_aloud.pdfIn PDF document text
    • https://s3.amazonaws.com/befafuni/characteristics_of_transcendentalism_in_american_literature.pdfIn PDF document text
    • https://s3.amazonaws.com/vuliwisuwig/54752804333.pdfIn PDF document text
    • https://s3.amazonaws.com/mesotodimus/61388099616.pdfIn PDF document text
    • https://s3.amazonaws.com/vobuturinivi/wugojoroditeladif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2497c62-c5f2-4d68-8d27-97813c6f0076/the_adventures_of_tintin_books_set.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8349e03-84c4-4982-b47a-5a8d458fc1a4/nujijavedibulosek.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_off00016eac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16EAC 5352 bytes
SHA-256: d255eb13f3092fd937392b660d8eeb3859d2975172bc2e3f833ce2708b19c04b
font_01_sfnt_off000180b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x180B5 20472 bytes
SHA-256: ad4f43738ccfd9122fb3f1ef2c810beb05a26cbfdf7c29b27db71a2fb59f9466