Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a433c0cade4657c…

MALICIOUS

PDF

83.4 KB Created: 2021-03-22 18:48:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 65b485115a365f9df2b9abf779538698 SHA-1: c6d3ace1b76e3cb77735086469c319fb7e95fefa SHA-256: 6a433c0cade4657c1860249b55f52708faca65d63635807a2f3348825d92d0ba
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 0.9967

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://soxebez.ru/aws?utm_term=words+that+start+with+a+to+describe+a+feelings+you+didn%2527t+know+existed PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4486763/normal_601a395b291cd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493610/normal_5ff57108bf762.pdfIn PDF document text
    • https://galofufe.weebly.com/uploads/1/3/1/3/131384583/namuwi_vazav.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456687/normal_5ff2212edeaf6.pdfIn PDF document text
    • https://jutewalezozapon.weebly.com/uploads/1/3/4/0/134016751/60aca581f1.pdfIn PDF document text
    • https://kigivalivago.weebly.com/uploads/1/3/4/3/134337689/bibigidufitakuro.pdfIn PDF document text
    • https://suvedezu.weebly.com/uploads/1/3/1/3/131379937/e9e08d77fa593a0.pdfIn PDF document text
    • https://viwoxinuzozaxa.weebly.com/uploads/1/3/1/6/131636825/tabomiw.pdfIn PDF document text
    • https://nerilumasufut.weebly.com/uploads/1/3/1/4/131437044/43f343cd52b457f.pdfIn PDF document text
    • https://zewadozodatigi.weebly.com/uploads/1/3/4/3/134337643/gugabelubujule.pdfIn PDF document text
    • https://sudejewakigalo.weebly.com/uploads/1/3/4/0/134040490/3e9f718f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450345/normal_5fd8f9c695ce5.pdfIn PDF document text
    • https://xefezabegeritaj.weebly.com/uploads/1/3/1/3/131379478/1624937.pdfIn PDF document text
    • https://lejuziluzamof.weebly.com/uploads/1/3/4/8/134863123/lakerenisomugirob.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jubiferekaka/jordan_belfort_wiki_pl.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cff0a0ba-d3ca-4813-9e41-f5dc1c773d21/what_does_a_black_dog_mean_in_a_dream_in_islam.pdfIn PDF document text
    • http://temomuduzuba.epizy.com/87117510809.pdfIn PDF document text
    • http://nigowona.rf.gd/67056200957.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f62e65c-10b9-4afb-a4c7-923960460514/14956706570.pdfIn PDF document text
    • https://s3.amazonaws.com/tawosutosuxi/43393184732.pdfIn PDF document text
    • http://tikikenuf.epizy.com/appointment_card_templates_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40dbef0a-c710-40ed-8762-cf56a3255833/how_long_does_carpet_take_to_dry_after_steam_cleaning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4390eb9-d244-4f0b-9871-040117b53b9d/how_to_explain_run_on_sentences.pdfIn PDF document text
    • http://xatidewivi.epizy.com/27773252189.pdfIn PDF document text
    • https://s3.amazonaws.com/kefefetafij/jelaguvevebesosutasoni.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c06f4af-5213-4210-99ba-d636d53e5161/wipolaneburoxasagis.pdfIn PDF document text
    • http://vijagomifeka.rf.gd/306672963.pdfIn PDF document text
    • https://s3.amazonaws.com/sepawi/canon_in_d_piano_chords.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_off00010487.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10487 5796 bytes
SHA-256: bbf7b7fcf7a6d7d8047b657618e017fd011876bb3767ac11e61c601e0b683e17
font_01_sfnt_off00011869.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11869 11492 bytes
SHA-256: 57fa7dae973048e32b939da662805a30f1ccc5bf396a2583f1bdc655136cd7f6