Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb9ca2e63c34c118…

MALICIOUS

PDF

76.0 KB Created: 2021-03-07 08:58:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 16a3e0da2148981498700bf3e69f16a7 SHA-1: 78eec0db639c6c227ed9ce3bddf431b320329191 SHA-256: cb9ca2e63c34c1188b91b27a95160ee2aca9c9db36ecd47643c7b33bfc7fa31f
186 Risk Score

Malware Insights

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

This PDF document is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous external links, with a primary URL pointing to a suspicious domain. The document's structure and the presence of many external links suggest an attempt to manipulate search engine results or redirect users to potentially harmful content, possibly for phishing or malware distribution.

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/award?keyword=holmes+mini+tower+air+purifier+with+maximum+dust+removal+filter+for+small+rooms PDF link annotation
    • https://sikiroradimer.weebly.com/uploads/1/3/4/6/134619363/66096b1238ed.pdfIn PDF document text
    • http://creamwalls.online/dapoxijesufo5773l.pdfIn PDF document text
    • https://gazewowotom.weebly.com/uploads/1/3/4/6/134616189/6032966.pdfIn PDF document text
    • https://tugalebuwe.weebly.com/uploads/1/3/4/0/134012885/279ae610efdf7.pdfIn PDF document text
    • http://bonus332.site/87207331618n6etr.pdfIn PDF document text
    • https://bojufare.weebly.com/uploads/1/3/1/0/131070992/suveto.pdfIn PDF document text
    • http://circleshtang.xyz/where_does_like_water_for_chocolate_take_placeeeuf7.pdfIn PDF document text
    • http://drilltech.info/23038828658htvny.pdfIn PDF document text
    • http://natbeach.space/4401175493hw3ix.pdfIn PDF document text
    • https://dejoputaxili.weebly.com/uploads/1/3/4/7/134763817/20f9b642cc3e1.pdfIn PDF document text
    • https://susulipazelavig.weebly.com/uploads/1/3/5/3/135335994/1714766.pdfIn PDF document text
    • https://tuzunogosur.weebly.com/uploads/1/3/0/8/130815213/josedeg.pdfIn PDF document text
    • http://gratoraama.website/bawaxonumezixmqu7b.pdfIn PDF document text
    • https://feveronibamuja.weebly.com/uploads/1/3/5/3/135300243/xonewituxejiv.pdfIn PDF document text
    • http://bluhgang.best/46016162957gjkc3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/accee80d-8d79-4c57-abf9-a399267dfd5a/48569668752.pdfIn PDF document text
    • https://s3.amazonaws.com/lewuli/manualidades_con_papel_doblado_paso_a_paso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e475eed0-72f8-4a80-8e1e-f6c2daad2368/skyrim_v_tips.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36eeff21-e3a8-473c-99cd-2b757abde7b3/does_ikea_donate_to_nonprofits.pdfIn PDF document text
    • https://s3.amazonaws.com/fopalew/polaroid_wall_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c709603-205d-4b19-8211-586c60aff399/what_does_it_mean_when_a_chevy_malibu_says_engine_power_reduced.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_off0000eb91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB91 5464 bytes
SHA-256: e2a0390d75af4a9fd1e59b0c560d70c4c744d0e8a149908e9e54745383162627
font_01_sfnt_off0000fe0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE0B 10400 bytes
SHA-256: 33ece350215e5c5ef4797025726919bdc313038878e97c2522652d558e520644