Malicious PDF — malware analysis report

Static analysis result for SHA-256 79002d136d1eac83…

MALICIOUS

PDF

76.9 KB Created: 2020-12-25 18:16:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: c1e3b624b5c201b23a4a325516be844b SHA-1: b5e76d84cb1d8e82d0cff06538fd88f2d903240e SHA-256: 79002d136d1eac83fe400a4c876e48929768344f8d0f76e340324b1eb65d6e2e
244 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, including critical detections for malicious redirector links and SEO link farms. The document contains numerous embedded URLs, many of which point to disposable hosting and redirector infrastructure, suggesting an intent to lure users to malicious sites. While no scripts were explicitly extracted, the nature of the embedded links and the ClamAV detection (Pdf.Phishing.Trojan) strongly indicate a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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://traffmen.ru/123?utm_term=spongebob+squarepants+wiki+fandom In PDF document text
    • https://davijune.weebly.com/uploads/1/3/5/3/135315517/wavenezozu.pdfIn PDF document text
    • https://bezijenogekise.weebly.com/uploads/1/3/4/8/134875893/4e20020ea2.pdfIn PDF document text
    • https://pirexabi.weebly.com/uploads/1/3/4/8/134885086/4291664.pdfIn PDF document text
    • https://cdn.sqhk.co/kilatelazobe/jhb0jhQ/amc_30_dunvale_movie_showtimes.pdfIn PDF document text
    • https://cdn.sqhk.co/vawikepaf/JSgjiiH/zazedopejama.pdfIn PDF document text
    • https://cdn.sqhk.co/ligilitojob/jhihfJO/prank_call_numbers_list_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/retirijozi/gfRozJ5/93639872022.pdfIn PDF document text
    • https://cdn.sqhk.co/zoboxoba/hjjdheE/comics_and_cartoon_maker_download.pdfIn PDF document text
    • https://kowalarezanir.weebly.com/uploads/1/3/1/4/131438161/3512310.pdfIn PDF document text
    • https://depufavekozumel.weebly.com/uploads/1/3/4/0/134017714/nuriw.pdfIn PDF document text
    • https://cdn.sqhk.co/wavoperusina/iJjdhfQ/evolution_2._0_podcast.pdfIn PDF document text
    • https://jotogenawe.weebly.com/uploads/1/3/1/4/131406354/zixokimumi.pdfIn PDF document text
    • https://nuvisinuxaxo.weebly.com/uploads/1/3/1/3/131383681/rufopobesiporo_gagonanir_puxure_verunaneverudef.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/426c09f2-f3a0-4c41-8f4d-00763bb6858e/87644075437.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cce720d0-13e1-4190-9c00-e3c00f1e3d7b/can_you_use_macros_in_dead_by_daylight.pdfIn PDF document text
    • https://s3.amazonaws.com/desekusoxi/soothing_instrumental_music.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_off0000ebc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBC7 5856 bytes
SHA-256: 6494bd2a0c1b0a0cf5322e34466b703a74f7d06e93ddc7e93dc81151850322ba
font_01_sfnt_off0000ffab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFAB 11496 bytes
SHA-256: 226b7a75b4afe4dcffb232071aabf8f7732d239f3014a20d1a4ffb86d589609a

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