Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c078e9b816caa07…

MALICIOUS

PDF

105.9 KB Created: 2021-03-22 19:05:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: ac9c46e2395d6648c9ead2b90ac7c285 SHA-1: 85467257a12e4515fb8e0f8f945f1fc3f51c0939 SHA-256: 0c078e9b816caa072f9e37bf279ea6a91e7e781a62697bfa71a54d412224c612
156 Risk Score

Malware Insights

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

The PDF document was flagged by ClamAV as 'Pdf.Phishing.Trojan' and ML classifiers indicated a high probability of maliciousness. It contains a large number of external links, many of which are dynamically generated SEO-style links pointing to other PDFs, suggesting a link farm or content-loading mechanism. One embedded URL, 'https://druttle.ru/wix?keyword=bugaboo+cameleon+stroller+instruction+manuals', indicates a lure to disguise the malicious intent. No scripts were extracted, but the structure and heuristics strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 5

  • 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.
  • 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://druttle.ru/wix?keyword=bugaboo+cameleon+stroller+instruction+manuals PDF link annotation
    • https://cdn.sqhk.co/zupitefa/h3hiQVD/53795032315.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420760/normal_604cdb4c47f6a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376600/normal_6008fcfbae289.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443598/normal_5ff4c2b5b53bb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414491/normal_5fc60aa0e6df1.pdfIn PDF document text
    • https://cdn.sqhk.co/birenejar/hjnb6ha/wavegelupepimuliloti.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375195/normal_601436ab27b33.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482853/normal_5fed3171e58fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447916/normal_602d574eeb0bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404515/normal_6057c8b942922.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371240/normal_5fde6bb46fc37.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410030/normal_60414cdc11e40.pdfIn PDF document text
    • https://cdn.sqhk.co/foseziwate/ieeUgdH/heart_racing_sinus_rhythm.pdfIn PDF document text
    • https://vidamizumowi.weebly.com/uploads/1/3/4/5/134598026/xejedofore.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372399/normal_60088ebbb21a5.pdfIn PDF document text
    • https://rofujerejikuf.weebly.com/uploads/1/3/5/3/135388349/b30767.pdfIn PDF document text
    • https://favesalaliba.weebly.com/uploads/1/3/1/3/131384568/zabuxupu.pdfIn PDF document text
    • https://jifilebipik.weebly.com/uploads/1/3/4/3/134375607/batowibebe-wakeguj-zijejan-naxaxopod.pdfIn PDF document text
    • https://laxivaxof.weebly.com/uploads/1/3/0/8/130874385/3278828.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/jezekemunidup/ant_man_trailer.pdfIn PDF document text
    • https://s3.amazonaws.com/risalenefazozo/autograph_all_audio_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/dakebesuvum/fadofoxijafotapumane.pdfIn PDF document text
    • https://s3.amazonaws.com/gatazeromij/attacco_dei_giganti_scan_ita.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_off00015f6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F6E 5308 bytes
SHA-256: 284a9f8bb8f874424b7839704a08840b3367d52408185155b8f0d26887f4c562
font_01_sfnt_off00017169.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17169 11300 bytes
SHA-256: a4a3f2da1cb97ac12da6d80aff6a94d3be71979a2f74cc3006280e8ec5249fc8

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