Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2e19376b09edad7…

MALICIOUS

PDF

84.6 KB Created: 2021-04-25 08:43:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 25be4127a0c938fe1aea2b4fd8f7d449 SHA-1: 9d9c40bb10b846bc8f6723447885c6a03623a9ae SHA-256: e2e19376b09edad7206b925eea514fa5d387539752f2bb10d49f595839982322
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a significant number pointing to potentially malicious domains, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a common tactic to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://zajinet.ru/strik?utm_term=reviews+on+lexus+nx+300+sport
    • http://swiss-family.space/the_wolf_among_us_xbox_one_controllerw8bmi.pdf
    • http://sugameloxufe.mywebcommunity.org/78835932855.pdf
    • https://novagonuneji.weebly.com/uploads/1/3/1/4/131483078/4745436.pdf
    • https://cdn-cms.f-static.net/uploads/4424692/normal_6018a30978a8f.pdf
    • http://dapajurop.mygamesonline.org/gmat_quantitative_practice_test.pdf
    • http://patajafurep.mywebcommunity.org/what_is_another_word_sensory.pdf
    • http://fb-ig-violation.com/94629060446d4j5p.pdf
    • https://zeposonuvijuz.weebly.com/uploads/1/3/4/7/134702940/kujefata-nofozaweka-mulenasa.pdf
    • https://rudofodirofebas.weebly.com/uploads/1/3/0/7/130739781/bd001.pdf
    • https://static.s123-cdn-static.com/uploads/4372101/normal_5ff65d5606f53.pdf
    • https://cdn-cms.f-static.net/uploads/4421048/normal_60402dcf553b7.pdf
    • https://gozowejikagigu.weebly.com/uploads/1/3/5/3/135345496/bawalulujefag.pdf
    • http://montana-media.com/what_does_the_bible_says_about_peacex49h4.pdf
    • https://static.s123-cdn-static.com/uploads/4446260/normal_6005ef752e636.pdf
    • https://dirotigakavomak.weebly.com/uploads/1/3/4/2/134235834/luserope.pdf
    • http://bonusiotsbera.online/79843596918odzfd.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/59d8321e-630e-42a6-ba48-146918b97890/kujesul.pdf
    • https://uploads.strikinglycdn.com/files/2118509b-d30a-4dc7-9c36-4950627bf1c0/15730884388.pdf
    • https://0ffdd24b-620b-4f4d-94ef-a39da1ca20bd.filesusr.com/ugd/853ce2_788d18a14f9e4b31ab1506f29a996cc6.pdf?index=true
    • https://21dbc830-6d60-48ad-8ab0-00d2b3cb69e0.filesusr.com/ugd/18d949_5a93d1c5210346ea987bedf29798d689.pdf?index=true
    • https://uploads.strikinglycdn.com/files/13f00bf3-c4cf-42e6-bb48-7465655d42dd/casio_5269_sgw-500h_battery.pdf
    • https://uploads.strikinglycdn.com/files/48071309-9ac3-4554-8687-c9921d3d6eec/76991175008.pdf
    • https://b32521b7-32ca-447e-9967-d27d0dce683d.filesusr.com/ugd/800b88_b526aed4102942b99e9077502ef3e2d0.pdf?index=true
    • https://uploads.strikinglycdn.com/files/fc0a1ac3-b3f2-4548-ba50-660bfdabb6b7/zarexufak.pdf
    • https://08c3cc13-1ce0-4add-927e-a3aed263473e.filesusr.com/ugd/ccf397_7c935f5c4a6b487490f85db4f3b42478.pdf?index=true
    • http://jozobudesurarab.onlinewebshop.net/wusepu.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010bbd.bin
7d38548ba6335580f50a513928bff6b024ac132bea982ac71060a3f1c218c484		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10BBD 5136 bytes
font_01_sfnt_off00011d65.bin
ea69d53fb915eee242e1c86333d6f446e4f73d4d31b811c3216211a8c116f4c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11D65 11044 bytes

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