Malicious PDF — malware analysis report

Static analysis result for SHA-256 188e374bfacca9dc…

MALICIOUS

PDF

76.9 KB Created: 2021-03-24 23:41:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1885f74632091caa89b347716ef89969 SHA-1: b84541fa27d489f86ec2e17c1e1150073ba59452 SHA-256: 188e374bfacca9dc86b76d02eaa5966a277670998daba83972b4da47b74a03cd
136 Risk Score

Malware Insights

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

The PDF contains multiple suspicious links, with one specifically noted as an invisible link to a suspicious domain, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were extracted, the presence of embedded URLs and the nature of the heuristics point towards a social engineering attack designed to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://pelibifir.ru/strik?utm_term=tracfone+lg+rebel+4+4g+lte+review
    • https://sopogokatoluj.weebly.com/uploads/1/3/1/0/131071191/74e82a1128.pdf
    • https://vojoritus.weebly.com/uploads/1/3/1/1/131164067/ferovuje_bebesoxiluru_zorewoxixokonej.pdf
    • http://loginwithfb.site/pudebudewoboks783i.pdf
    • http://pasetbs.xyz/pofoxoso9nj93.pdf
    • http://ririrukonexiliz.iblogger.org/amnesia_memories_psp.pdf
    • http://zefikono.22web.org/54387255932.pdf
    • https://wewofubajibopa.weebly.com/uploads/1/3/1/3/131381003/7370990.pdf
    • http://pinerapidsrr.com/is_tris_really_dead_in_insurgent2qr2o.pdf
    • http://prosale.company/weretibakonoa5q68.pdf
    • http://contentmedialiteracy.com/59367126635bsdwd.pdf
    • http://menbp.online/public_health_101_healthy_people-healthy_populationsq7m2m.pdf
    • http://vegekezivujid.22web.org/warcraft_3_frozen_throne_campaign_secrets.pdf
    • https://voletiga.weebly.com/uploads/1/3/4/5/134501602/748a889b48042.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://zazedosipafefu.epizy.com/cccam_prio_maker_ipk.pdf
    • https://04fc2a56-3ca8-4b90-bfe8-b05f9e7ed3d8.filesusr.com/ugd/51e9d0_80b8ff753ca240e2a0b1e54b2e94e46b.pdf?index=true
    • https://27158da8-170d-48ca-a528-b8ced62fe517.filesusr.com/ugd/9fc8c3_a143f98ec4f148e29a2c7f766ebe24c3.pdf?index=true
    • https://a3c35cc3-4a3f-4d41-ab51-8b3e4b114d30.filesusr.com/ugd/2b25b5_2c59c933258d4f41a7e66ac466ad1dc0.pdf?index=true
    • http://kiwexenuraxenab.rf.gd/keurig_2.0_filter_change_youtube.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_off0000ee93.bin
16845c105af8d67ff0ca5affd98d678211e83eb091c416bf2a96d0b63c24646e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE93 5200 bytes
font_01_sfnt_off0001006c.bin
8d9e345e5c9f366da277bcd2defeeed8fc2782fc136f10529933c3bb2e65b596		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1006C 11228 bytes

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