Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b80abcb5fdeaae7…

MALICIOUS

PDF

75.7 KB Created: 2021-01-02 11:31:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: f0338a6d5934ba16d9bf77821ff951be SHA-1: 38776f29f32e99ac06df35232a6b0b6607e2853f SHA-256: 9b80abcb5fdeaae73836840c3a43f45f134c988c756a6a66745143266c6d3fc2
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting it's part of a link farm designed to manipulate search engine results or redirect users to malicious content. The embedded URL 'https://traffnew.ru/aws?utm_term=caught+on+camera+news+reporter' further supports the lure of news-related content to attract clicks.

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
  • 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://traffnew.ru/aws?utm_term=caught+on+camera+news+reporter PDF link annotation
    • https://fewefemuge.weebly.com/uploads/1/3/4/3/134372507/4247526.pdfIn PDF document text
    • https://nutarubanamu.weebly.com/uploads/1/3/4/5/134528768/dbffc9830c.pdfIn PDF document text
    • https://cdn.sqhk.co/saseponirifa/bijggcN/95169578171.pdfIn PDF document text
    • https://wanuvimuz.weebly.com/uploads/1/3/4/4/134462356/kusobojanot_woxiguzija_juliridin.pdfIn PDF document text
    • https://cdn.sqhk.co/govulasem/cjaidY0/sapoboxovejirotovat.pdfIn PDF document text
    • https://xoririsi.weebly.com/uploads/1/3/4/8/134848275/2756640.pdfIn PDF document text
    • https://womomoko.weebly.com/uploads/1/3/4/8/134848640/soseguninex.pdfIn PDF document text
    • https://cdn.sqhk.co/xopigotax/egijjIM/53618474017.pdfIn PDF document text
    • https://matekulelesij.weebly.com/uploads/1/3/4/8/134858821/f6117c.pdfIn PDF document text
    • https://gonutorimi.weebly.com/uploads/1/3/4/5/134590267/d115b6b6.pdfIn PDF document text
    • https://bibeliki.weebly.com/uploads/1/3/0/7/130738572/pekaberosevaji-navoxojulan.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/1a27643b41869.pdfIn PDF document text
    • https://cdn.sqhk.co/zopinulepa/jfl7lhj/tip_top_health_shoppe.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/mejawiwomak/android_remove_google_account_factory_reset.pdfIn PDF document text
    • https://s3.amazonaws.com/lunojol/20008218863.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_off0000e9e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E3 5312 bytes
SHA-256: d8f8edc851358f7110814e76bb7ab2172ca17ff6f6f4a03ab63c85e6a8140882
font_01_sfnt_off0000fbdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBDC 11116 bytes
SHA-256: 72647cf883e9d952ecc6691e4cfe2ec504da43df0ce23dfa310822e7447adbd7

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