Malicious PDF — malware analysis report

Static analysis result for SHA-256 374eee07b0baced4…

MALICIOUS

PDF

73.3 KB Created: 2021-01-31 19:30:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: a905627343027eb2c2639101ec53f7c8 SHA-1: 73b639314279d04498a7099097772d7196fa9e87 SHA-256: 374eee07b0baced4531a6a620d8a30ac1e21affda516ba78d2f40f7083c5eb68
252 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://crophysi.ru/wb?keyword=company%20of%20heroes%20movie%20download In PDF document text
    • https://cdn.sqhk.co/jepipovi/bashaha/liverpool_echo_breaking_news_twitter.pdfIn PDF document text
    • https://jegivobepumo.weebly.com/uploads/1/3/4/4/134444156/5a56b075e60.pdfIn PDF document text
    • https://befunopokoxa.weebly.com/uploads/1/3/5/3/135327779/9803374.pdfIn PDF document text
    • https://kirebokiva.weebly.com/uploads/1/3/4/6/134634247/2536356.pdfIn PDF document text
    • https://metiledozixav.weebly.com/uploads/1/3/1/1/131164016/kagozosijujom.pdfIn PDF document text
    • https://cdn.sqhk.co/letijefa/BEgiiar/11223227223.pdfIn PDF document text
    • https://cdn.sqhk.co/koroxofusino/7gvAgg6/rutufebuzigewenexoliwu.pdfIn PDF document text
    • https://cdn.sqhk.co/letaziseb/TPnuieU/digital_trends_glassdoor.pdfIn PDF document text
    • https://fezuwujazu.weebly.com/uploads/1/3/5/3/135347069/ruluwolijatu.pdfIn PDF document text
    • https://zotekuruwufuk.weebly.com/uploads/1/3/4/1/134108654/gokewajotu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407087/normal_5fdef3bbb78dc.pdfIn PDF document text
    • https://wigowuwadapol.weebly.com/uploads/1/3/5/3/135315864/xikakekus.pdfIn PDF document text
    • https://cdn.sqhk.co/pazaxefuma/hgidGhd/vapagatajexosegaj.pdfIn PDF document text
    • https://rinixupikexem.weebly.com/uploads/1/3/4/0/134096042/xadanubaxivekegitu.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/bokexizometun/ecology_journal_reference_format.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_off0000e340.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE340 5440 bytes
SHA-256: 9cd0f8251bb3ee89bd845d01874a0e1a84b6c0dba2f4643e474f661374b9f2b5
font_01_sfnt_off0000f5af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5AF 10232 bytes
SHA-256: 97f11a96f08cb5d01ca9af269790ffc974d66f66046fefa8d9aedccad6beb6f2

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