Malicious PDF — malware analysis report

Static analysis result for SHA-256 e06f0f8e39833769…

MALICIOUS

PDF

69.5 KB Created: 2021-01-01 08:20:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: e144dadf2e598616f80dd5a960c9e200 SHA-1: d6c64d98405886690630bbf370363942acb55ace SHA-256: e06f0f8e39833769454b3ada20146ccbc49943be38021241dd5a920768a8e115
244 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to disposable hosting, and at least one link to a known malicious redirector. This behavior is indicative of a link farm designed to manipulate search engine results or direct users to malicious sites. The ClamAV detection and ML classifier further support its malicious nature, suggesting it may be a phishing or trojan delivery mechanism.

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://cctraff.ru/strik?utm_term=car+mechanic+salary+florida In PDF document text
    • https://cdn-cms.f-static.net/uploads/4481282/normal_5fc2014467b0e.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/ralanexoj.pdfIn PDF document text
    • https://mebedepubini.weebly.com/uploads/1/3/0/8/130813558/3688000813fc08.pdfIn PDF document text
    • https://dinofewujib.weebly.com/uploads/1/3/1/3/131379591/fitutivudaxazigon.pdfIn PDF document text
    • https://xisevulatunetu.weebly.com/uploads/1/3/4/5/134595014/1267884.pdfIn PDF document text
    • https://ladofozaser.weebly.com/uploads/1/3/4/3/134334290/mituvix.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453754/normal_5fe481b55116b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471488/normal_5fec3863befdc.pdfIn PDF document text
    • https://xubuvene.weebly.com/uploads/1/3/1/3/131380433/13eab.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/15262448-50e2-4f3e-81ae-52fc945d3535/95701952530.pdfIn PDF document text
    • https://s3.amazonaws.com/zunewidimem/walk_through_the_american_revolution_battle_scenes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/500c6bc6-f041-46e4-a413-f75e2489410a/how_much_lto_car_registration_renewal_fee_2020_philippines.pdfIn PDF document text
    • https://s3.amazonaws.com/rodakarugupoko/bose_soundsport_headphones_manual.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c61e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC61E 5268 bytes
SHA-256: f8bff9101c52d9b269ea00aa7285b96ccaa948084c61c56aa850b4ca646866f4
font_01_sfnt_off0000d7df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7DF 3720 bytes
SHA-256: 40ef96da86b6123d577d475be460de15c41b9ca7393a8e650be4e9942aa3c64b
font_02_sfnt_off0000e341.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE341 11088 bytes
SHA-256: 94088d6863bb99839963ee87d21cd8ccf0229757e638bd3c0c9cb5450f805e1e

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