Malicious PDF — malware analysis report

Static analysis result for SHA-256 5129e353d9fbaa68…

MALICIOUS

PDF

73.7 KB Created: 2021-03-27 11:54:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 49231328fcd802366f2c37f27f95b012 SHA-1: 5f6c79695b27be4a5d83d885f753b3d475b3aed2 SHA-256: 5129e353d9fbaa686ff62baa14846934df6a8f5543af43c4d997d73fd519828a
244 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to disposable hosting or are part of a link farm. One critical heuristic identified a link to a known malicious redirector at 'https://dafemum.ru/wix?keyword=ff14+white+mage+guide+reddit'. The ML classifier and ClamAV also flagged this file as malicious, indicating a phishing or trojan-like behavior.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/wix?keyword=ff14+white+mage+guide+reddit In PDF document text
    • https://cdn-cms.f-static.net/uploads/4460266/normal_605abe42bb804.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378152/normal_603f22ae10304.pdfIn PDF document text
    • http://sizegoduxuxa.mygamesonline.org/megomuxoludesogidosis.pdfIn PDF document text
    • https://bimuwosexiwo.weebly.com/uploads/1/3/1/1/131164043/sexifewavereji_pupixijutibof.pdfIn PDF document text
    • https://kazowutulegopos.weebly.com/uploads/1/3/5/3/135324393/db71f28cf5e.pdfIn PDF document text
    • https://xexinujufametu.weebly.com/uploads/1/3/4/5/134502762/zowexemalapoxuwefa.pdfIn PDF document text
    • http://kevifiregerufug.scienceontheweb.net/99767535237.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369659/normal_5fe208fb68629.pdfIn PDF document text
    • http://buvalopexur.mygamesonline.org/buffy_coat_preparation.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/zidenigad/zopirarosusesezidup.pdfIn PDF document text
    • https://e50eee24-2d95-422d-8083-6f618d95927b.filesusr.com/ugd/594ae5_0871188806084d5fbba4ed7c5fe3546d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zewimu/77023756230.pdfIn PDF document text
    • https://58552d80-c20c-4e4f-99b9-91bedbcc07a3.filesusr.com/ugd/c18496_d000c69391e046cfb1f2b7bb51813a73.pdf?index=trueIn PDF document text
    • https://e0220c8c-c322-4c33-af83-7c5b0fe00b66.filesusr.com/ugd/a771bd_a0d9ba70d2ba4c5da5fb44308d9ff57a.pdf?index=trueIn PDF document text
    • https://33b7cf8b-1cb2-46d9-9063-17e97cba5e80.filesusr.com/ugd/9edd50_7d9fa9a803b343f5b15ffa4a33e6436d.pdf?index=trueIn PDF document text
    • https://8cff94d3-ecab-4ea5-ad27-d3e67d02fd32.filesusr.com/ugd/2813e2_c5309ac148a84a2cac7ce488b4c4777c.pdf?index=trueIn PDF document text
    • https://90ff81fc-98d9-4e53-96a3-aaa5c1c2042e.filesusr.com/ugd/bb5aff_19d20973fc644ee6bda5d889027534f1.pdf?index=trueIn PDF document text
    • https://ce3a146a-d504-4efb-981c-4593fb85d965.filesusr.com/ugd/5b5da7_263275eb71be49898a5c4e080b1bce57.pdf?index=trueIn 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_off0000e097.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE097 5300 bytes
SHA-256: 063d5242706c0b1252783b7c9036ec3e82e3a65bdb135bf5d6324fcc8d6c16d4
font_01_sfnt_off0000f28f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF28F 10996 bytes
SHA-256: 0daa65a403a9986b78404174c695acd5bd215dfa57906c39f86ec03508df9dc6