Malicious PDF — malware analysis report

Static analysis result for SHA-256 44ccba954abdfebe…

MALICIOUS

PDF

73.0 KB Created: 2021-04-17 05:18:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 8517cd272ca241fa77103a11ca6eca38 SHA-1: b74dbaf75f97119f41fcd01fdda52d01b670388a SHA-256: 44ccba954abdfebe00bce6c3382f8636d27b65394ca72994ed4c07cb3daa71ed
196 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, with one identified as an SEO redirector likely used for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://golowaki.ru/strik?utm_term=flying+star+2020+feng+shui PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4491450/normal_5fe1f5657186e.pdfIn PDF document text
    • http://suxoxaxowigab.scienceontheweb.net/33055016549.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405179/normal_5fd9580039799.pdfIn PDF document text
    • http://gixodugesu.medianewsonline.com/alter_ego_plus_5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368493/normal_6026ad9db667c.pdfIn PDF document text
    • http://xizerunax.scienceontheweb.net/12535759675.pdfIn PDF document text
    • http://vaxenovutejuzid.sportsontheweb.net/mfj-939i_automatic_antenna_tuner.pdfIn PDF document text
    • http://rivozuzeno.mywebcommunity.org/vonorivizabapena.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6131fb9f-3080-406c-a6ab-c4686b6a2f6f.filesusr.com/ugd/52be6f_aeabf9b5a18447a8920112f0a842cdf9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bejideba/dobekurafuvipa.pdfIn PDF document text
    • http://wulibazosuxib.onlinewebshop.net/88461657307.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxawetawupo/69447234339.pdfIn PDF document text
    • https://ea74ff18-003d-4094-8454-8d7e15e33abb.filesusr.com/ugd/50de67_88d0af70a49342a1bb15fee0a11cdcf1.pdf?index=trueIn PDF document text
    • https://47a25507-5c4f-4e73-9b7c-0c49514c8174.filesusr.com/ugd/e00bd3_6a344a6793394cc897845f7fb26cd698.pdf?index=trueIn PDF document text
    • https://bbfcab69-cab0-43b8-b861-839d52945da6.filesusr.com/ugd/fa71eb_137e2979e8e448a4a1a46b81120b5865.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lorifawuvawot/45570764953.pdfIn PDF document text
    • https://s3.amazonaws.com/gorajikunobixi/nunusipewusituwose.pdfIn PDF document text
    • https://dec4a425-646e-450a-80ca-a73a75d058ad.filesusr.com/ugd/ba3095_9701bd43692a4cfb858caf2b90b2948a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/all_cats_have_asperger_syndrome.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_off0000e1bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1BC 5360 bytes
SHA-256: de7ce5a46b47aa4895aafc46f2ef8a8a92d4581f8906394b3902f9f66d09e0b5
font_01_sfnt_off0000f402.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF402 10368 bytes
SHA-256: 1887726ddce0f98391bb71b556c78e69f20b0013857f87913c8a15fcadc070da

Open this report in the interactive analyzer, or submit your own file for analysis.