Malicious PDF — malware analysis report

Static analysis result for SHA-256 562ed3330472c1ee…

MALICIOUS

PDF

87.8 KB Created: 2021-01-16 12:33:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: afac5f3a1dd35b9138304d924a9b72a8 SHA-1: 22b8d47c2580e0483041e7717ac44a9fe9bdf62a SHA-256: 562ed3330472c1eef8c02b0ddfe1318ed62496e48fc0eb61e8c4082b608fa718
244 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple critical heuristics as malicious, including a redirector link and a link farm. The ML classifier also assigned a very high probability of maliciousness. The embedded URLs suggest a phishing or malware distribution campaign, likely using the document as a lure to redirect users to malicious sites. No scripts were extracted, but the presence of numerous external links indicates a high likelihood of directing users to malicious content.

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://gettraff.ru/aws?utm_term=chronic+liver+disease+management+guidelines In PDF document text
    • https://cdn.sqhk.co/vefuwebilux/icA9Egc/las_vegas_atv_tours_valley_of_fire.pdfIn PDF document text
    • https://wenibowefopari.weebly.com/uploads/1/3/0/8/130814001/5765062.pdfIn PDF document text
    • https://cdn.sqhk.co/ketegobuto/gXjixzX/make_photo_slideshow_with_music_free.pdfIn PDF document text
    • https://jajewivazag.weebly.com/uploads/1/3/4/4/134491582/dfc17a14687.pdfIn PDF document text
    • https://cdn.sqhk.co/segenoliz/6FOhThf/jusavagajamofo.pdfIn PDF document text
    • https://rurasaza.weebly.com/uploads/1/3/4/8/134869927/mefanaf_gevaje_gazona_dafurejuju.pdfIn PDF document text
    • https://nuzunovi.weebly.com/uploads/1/3/5/3/135314570/3075211.pdfIn PDF document text
    • https://cdn.sqhk.co/goworonol/c0gcieK/playstation_5_for_sale_amazon.pdfIn PDF document text
    • https://site-1180799.mozfiles.com/files/1180799/reduce_file_size_online_below_200kb.pdfIn PDF document text
    • https://mutakisutuw.weebly.com/uploads/1/3/4/7/134768563/ed2f3ed284.pdfIn PDF document text
    • https://cdn.sqhk.co/pazakazagoz/Mo0jejf/world_history_patterns_of_interaction_guided_reading.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457011/normal_5fe7486fe20e7.pdfIn PDF document text
    • https://site-1199632.mozfiles.com/files/1199632/puwukozab.pdfIn PDF document text
    • https://tizusetupo.weebly.com/uploads/1/3/1/6/131607013/zodurisalinemebifi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484356/normal_5fe9d7b085a71.pdfIn PDF document text
    • https://nefirekemoziwep.weebly.com/uploads/1/3/4/3/134332842/tuzadov-purewokaj-lanixir.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00011c29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C29 5316 bytes
SHA-256: 1817dcd76599e4eb4caab62da0abf9500fcaf7842ab1343307357a030c9ebd0e
font_01_sfnt_off00012e11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E11 10468 bytes
SHA-256: ac82739d01f766931f8e5675f5f325a757fd82e18734c8dc4302cb1c42cab7f3

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