Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d0709a5eb593f8b…

MALICIOUS

PDF

81.6 KB Created: 2020-12-16 17:51:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 3b65dafe512231dde51464e39962e1f7 SHA-1: 118009b786b3901f45341f5dc010caf99341a556 SHA-256: 5d0709a5eb593f8be8e0ffa187799fb4939d3738474bb0f9ef9b42ac5070ceb9
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, with the primary URL being a potential phishing or SEO manipulation lure. ClamAV and ML classifiers strongly indicate maliciousness. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest an attempt to redirect the user to malicious content, potentially for malware distribution or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://trafffi.ru/strik?utm_term=preterite+vs+imperfect+story+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4375698/normal_5fc3e602610da.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/rugatu-rugot.pdfIn PDF document text
    • https://vuxojamobepu.weebly.com/uploads/1/3/4/3/134333522/merajikakav-fiwerixovozi-rasejibusugil-munekoresuvade.pdfIn PDF document text
    • https://sitoluvumoroge.weebly.com/uploads/1/3/4/7/134762666/dusopete_jegubo_jenuwajaxova_viwarezu.pdfIn PDF document text
    • https://gunoserikufetof.weebly.com/uploads/1/3/4/3/134360264/bolizot-sotewukofaguxir-kelugofati-rotewepukiwow.pdfIn PDF document text
    • https://tevupiju.weebly.com/uploads/1/3/4/8/134865653/3151310.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378386/normal_5f8fbcae79cb5.pdfIn PDF document text
    • https://panebafizi.weebly.com/uploads/1/3/4/3/134365464/385594b427dc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/mubefula/picsart_gold_mod_apk_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/rujabepifar/1432156274.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/22688922797.pdfIn PDF document text
    • https://s3.amazonaws.com/bovenotojitowe/71118491336.pdfIn PDF document text
    • https://s3.amazonaws.com/tetofamuxulil/pejude.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF66 4904 bytes
SHA-256: 3f126ed099fd6b8d938c25d291dbe6ddd074052c66579175b6b10805736e0851
font_01_sfnt_off0000f024.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF024 11176 bytes
SHA-256: 146063bfd703351a773bed4ab07125791dc01a11317ff321dc242f906b6e9589
font_02_sfnt_off0001151c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1151C 16376 bytes
SHA-256: c3d0ee408bee49a88931d2ac630a9fb52e88a46fabab5a72aa19e78bbe1d3826
font_03_sfnt_off00012ac4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AC4 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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