Malicious PDF — malware analysis report

Static analysis result for SHA-256 c45ab1665b2ebaab…

MALICIOUS

PDF

79.6 KB Created: 2021-03-15 02:34:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 1a17738f0314b28d1c2e415031b4896c SHA-1: e8a345ce7d614acf6dba69eafa98b8144c0bcea6 SHA-256: c45ab1665b2ebaabcb3d965a710385df591fb8d94e24aacd96e76f12dc0d1315
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. ClamAV and ML classifiers identified this file as malicious, specifically a phishing or trojan variant. The embedded URLs suggest an attempt to redirect users to potentially harmful content or phishing sites.

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://soxebez.ru/strik?utm_term=brand+identity+definition+pdf PDF link annotation
    • http://retapadu.medianewsonline.com/sodarijakixevuf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459629/normal_5fde313487eeb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403951/normal_5fd8b3ae1f5bd.pdfIn PDF document text
    • https://vetasokimatajed.weebly.com/uploads/1/3/5/2/135296406/286c9.pdfIn PDF document text
    • https://venunuwaxel.weebly.com/uploads/1/3/2/7/132740799/0ec845.pdfIn PDF document text
    • https://ragojozuzaz.weebly.com/uploads/1/3/4/6/134668900/tatijigogope_sebinakilarube_liwulor.pdfIn PDF document text
    • https://midodelawipage.weebly.com/uploads/1/3/4/5/134585137/809a97.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408319/normal_602a0e24776d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366642/normal_60344c436b15d.pdfIn PDF document text
    • http://vurovolapoza.mygamesonline.org/62352391890.pdfIn PDF document text
    • https://rigugoxa.weebly.com/uploads/1/3/0/7/130776225/5d8ed2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366306/normal_5fe906fc3e506.pdfIn PDF document text
    • http://xenojupu.mywebcommunity.org/vujigazuturigolefate.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377098/normal_5fcc72a8c5aae.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://21c505bb-01ca-4817-a549-4ed1ebba5040.filesusr.com/ugd/7d7105_d06d68c5df044911bad4c2185250f8b5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/muxozuvalubi/armored_core_5_pc.pdfIn PDF document text
    • http://rosajeku.myartsonline.com/sikiradupoxisobodojobowu.pdfIn PDF document text
    • https://16fd3b15-5541-4454-9538-28daacbf497e.filesusr.com/ugd/e32576_f78b5fce1dbf4f678aab21e539f1febd.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zalomi/what_is_a_good_healthy_breakfast_drink.pdfIn PDF document text
    • http://xomapagovujux.atwebpages.com/duxigavizod.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_off0000fa78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA78 4976 bytes
SHA-256: db7fffc9698ae42622c4895e842de5b11ec357ea0289e360c130219a91039f55
font_01_sfnt_off00010b84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B84 10944 bytes
SHA-256: 19b1ba2e9813b13afc50bef826116d8ecd320428068116f54d162c898b29dfde

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