Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f5b024cbe89aad4…

MALICIOUS

PDF

68.9 KB Created: 2021-03-15 12:10:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: caa4b82cd032a749205bb7b34899dde4 SHA-1: 66cdf22098568b5545cb682148b3e24b7d28fa1f SHA-256: 6f5b024cbe89aad44906df1b93068a73be76a8da304d7c4217c7c2018eeb690a
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to direct users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of malicious activity.

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://xezojetit.ru/wix?keyword=the+telltale+batman+shadows+edition+trophy+guide PDF link annotation
    • https://cdn.sqhk.co/fusaduxuw/ajjegd0/82956515600.pdfIn PDF document text
    • https://cdn.sqhk.co/vedasukuki/CicvGkN/iron_bottle_opener_personalized.pdfIn PDF document text
    • https://cdn.sqhk.co/vugomupuzisa/7hcgeW6/opera_v_balet_teatr_afisa.pdfIn PDF document text
    • https://cdn.sqhk.co/kedezoge/7Ygc8id/lorasabozapufe.pdfIn PDF document text
    • http://kuvurewe.22web.org/mathematics_textbook_for_class_10.pdfIn PDF document text
    • https://cdn.sqhk.co/zozijawutuxu/hh7jgf8/real_air_hockey.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/bopuxosavubare/lagu_bobotoh_famiglia.pdfIn PDF document text
    • https://d56a38bf-d62e-453c-9b5b-5b2fe88aea46.filesusr.com/ugd/359e64_1dbff90fec774791882e65e29fedfed8.pdf?index=trueIn PDF document text
    • http://wamodaf.epizy.com/semicolon_worksheet_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/zamemigojat/rinomamufapubux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebc4c02b-d7b0-41fa-85e5-bca47ec8d17e/carrier_debonair_220_installation_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/462ab4fe-97f4-4b5a-b8c3-3694ea4556cd/paxepe.pdfIn PDF document text
    • https://s3.amazonaws.com/xotomisen/vetakodimisi.pdfIn PDF document text
    • https://s3.amazonaws.com/jolunenafobuw/zurededowu.pdfIn PDF document text
    • http://lotitivixuji.rf.gd/oracle_database_11g_sql_fundamentals.pdfIn PDF document text
    • https://s3.amazonaws.com/xoferuzu/85697647103.pdfIn PDF document text
    • https://s3.amazonaws.com/vososasoxumete/fedilis.pdfIn PDF document text
    • https://1682489e-d94b-4f22-b6a6-c8ecb623ca2e.filesusr.com/ugd/5f226e_5ac14fb5a32949e9bdfa075f20a053ba.pdf?index=trueIn 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_off0000ce06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE06 5656 bytes
SHA-256: ebc81bb2dbd6f3377ad8dade031f929889bd61f45eeb4e88f0c703cfa0b419eb
font_01_sfnt_off0000e126.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE126 10500 bytes
SHA-256: 94821685c8dd486e2c2511fbd5221bfbad5998c70e580094b3001cde906ca4d3

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