Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c1d9b012fb58960…

MALICIOUS

PDF

72.4 KB Created: 2021-03-28 18:47:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: d9513f8a6ea43863a32b7b6a9990b028 SHA-1: b31a156034cf3e316e7a49606341818396c4431e SHA-256: 7c1d9b012fb58960ab7929744dd8c7ff379990f7afd59f57c23af0152152d052
164 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses an urgency-based lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://midufefew.ru/strik?utm_term=fedex+drop+off+locations+bridgeport+wv PDF link annotation
    • https://vunozeguwogiwe.weebly.com/uploads/1/3/4/7/134745761/f45086.pdfIn PDF document text
    • https://fitokuzigijot.weebly.com/uploads/1/3/4/6/134681543/sazedam-vususat-lugozuz-kiwemeze.pdfIn PDF document text
    • https://zebaraxofalolal.weebly.com/uploads/1/3/0/8/130813897/lakaroxakobawi_xabenade_veniwenum_javanakub.pdfIn PDF document text
    • http://wivaserana.mywebcommunity.org/58560969857.pdfIn PDF document text
    • https://rujemadatidugu.weebly.com/uploads/1/3/4/7/134747735/vavafomepuze.pdfIn PDF document text
    • https://balevowoperat.weebly.com/uploads/1/3/1/3/131397989/fodelojukivine_nividarexuzavi_kimisezejebav_didop.pdfIn PDF document text
    • http://roskycnmx.com/rixejiposifoxukeliwyqs3x.pdfIn PDF document text
    • http://rasezatoxefu.mygamesonline.org/29428788270.pdfIn PDF document text
    • http://normaa-id.com/i_too_sing_america_title_meaningh9qkl.pdfIn PDF document text
    • http://retamos.mygamesonline.org/kitchenaid_superba_dishwasher_instructions.pdfIn PDF document text
    • http://kixurox.getenjoyment.net/aux_champs_elysees_lyrics.pdfIn PDF document text
    • https://folarudivol.weebly.com/uploads/1/3/1/8/131871739/palijimogumafuses.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zerokafejedumij.rf.gd/wapowubetarifuvejom.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzaganog/the_story_of_oj_simpson_netflix.pdfIn PDF document text
    • https://s3.amazonaws.com/dojonuta/jepafijijexeg.pdfIn PDF document text
    • https://s3.amazonaws.com/bodajaku/69521255495.pdfIn PDF document text
    • http://kowewewabozete.epizy.com/doderexomupolovafi.pdfIn PDF document text
    • https://s3.amazonaws.com/fapaga/totalekokonifugibagi.pdfIn PDF document text
    • http://fiforeru.atwebpages.com/after_we_fell_book_download.pdfIn PDF document text
    • https://s3.amazonaws.com/firudegix/subject_verb_agreement_worksheets_for_class_6.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_off0000dcfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCFB 5636 bytes
SHA-256: 77d995a61e016ff66c420a04352669bff3f3d4192274c3ce8d139e8154a65b7c
font_01_sfnt_off0000f051.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF051 10596 bytes
SHA-256: d3de808b96a654851cf793915b7036868dfecf2f78c16bc66e6475ecce570927

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