Malicious PDF — malware analysis report

Static analysis result for SHA-256 8286284cd935b510…

MALICIOUS

PDF

81.6 KB Created: 2021-02-23 17:42:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: c33ee3581855a32238162f6f222ed4ce SHA-1: 2833ef8d809b1c3448091a9d6e54902ecf51c7b7 SHA-256: 8286284cd935b510b4506eda9738a912c373b2b3dc2e35a139f2eb6bff9d6307
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by both ML classification and ClamAV, flagging it as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing campaign. The presence of numerous external URLs indicates an attempt to redirect users to potentially 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
  • 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://baarspo.ru/strik?utm_term=short+story+generator+with+spelling+words PDF link annotation
    • https://nezuvaju.weebly.com/uploads/1/3/0/9/130969963/f99e8e828.pdfIn PDF document text
    • https://femodamokej.weebly.com/uploads/1/3/4/5/134529999/3516726.pdfIn PDF document text
    • https://nasuxixogidipan.weebly.com/uploads/1/3/4/7/134701521/sonovogipewu.pdfIn PDF document text
    • http://sayseedokg.com/college_edouard_herriot_pronoteebjiv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491410/normal_5fc9996804db8.pdfIn PDF document text
    • http://agencymedia-ig.com/rawijogeniwovarejuxo4aaqy.pdfIn PDF document text
    • https://tatogupuragafa.weebly.com/uploads/1/3/4/0/134096405/5b73f025.pdfIn PDF document text
    • http://extrameets.fun/restraining_order_ny_form7h0a4.pdfIn PDF document text
    • http://lnstagram-copyright-supports.com/anatomy_for_sculptors_understanding_the_human_figure0jep9.pdfIn PDF document text
    • http://milesnires.xyz/belipidasezopevofefusulabmyxn.pdfIn PDF document text
    • https://raxagipob.weebly.com/uploads/1/3/4/8/134883443/setekusisiveza.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376105/normal_600c6e5890f28.pdfIn PDF document text
    • http://hhizmet.com/how_to_use_the_new_rainbow_vacuumgl2np.pdfIn PDF document text
    • https://lisomoduxu.weebly.com/uploads/1/3/1/3/131383329/senejabugegadafigava.pdfIn PDF document text
    • http://changely.club/84228558854mk2by.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489988/normal_60126564c1b6c.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/wonumafubij/android_9_vs_8.pdfIn PDF document text
    • https://s3.amazonaws.com/fowonaxul/garafajuzadasutat.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010188.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10188 5520 bytes
SHA-256: 73ddfd0d7f1186682ea14a989253b6bdc7c4f25a92dd885e40e1d6d2b262f9f8
font_01_sfnt_off00011459.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11459 10840 bytes
SHA-256: 056a8cbabb380c89d3b8dfdeff44861777a454047c607dae0caabc682bba7017

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