Malicious PDF — malware analysis report

Static analysis result for SHA-256 f074f6cb2384b973…

MALICIOUS

PDF

73.4 KB Created: 2021-03-06 07:28:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: a129bf2f8521304277045714a7d461d4 SHA-1: abaa85ab07e37aab23dfbf981e9ab39284f61dc9 SHA-256: f074f6cb2384b973c7ada88666502079277dd847455695bb762d8001c7d7949c
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to potentially malicious domains, as indicated by the PDF_SEO_LINK_FARM heuristic and ClamAV detection. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the overall structure suggest an attempt to redirect users to phishing or malware-hosting sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://dugedepap.ru/aws?utm_term=the+tale+of+peter+rabbit+book+worth PDF link annotation
    • https://sovejugi.weebly.com/uploads/1/3/4/6/134652237/fagifapanori.pdfIn PDF document text
    • http://liko-sneakers.com/why_should_you_want_to_be_a_midwife324pe.pdfIn PDF document text
    • https://tofikopu.weebly.com/uploads/1/3/1/3/131381225/bbec798.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477386/normal_600c83b55f8da.pdfIn PDF document text
    • http://itagreen.fun/scary_horror_escape_level_6g211r.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447662/normal_5fd7cba6236f2.pdfIn PDF document text
    • http://romeital.space/850134281537w0yq.pdfIn PDF document text
    • http://scandisvet.ru/1_dm_cubico_cuantos_metros_cubicos_son03wbh.pdfIn PDF document text
    • https://puwegamojone.weebly.com/uploads/1/3/4/7/134702565/weliwafujujerefofiw.pdfIn PDF document text
    • https://gosizunasinati.weebly.com/uploads/1/3/0/7/130739879/4936780.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/ladojenefe/awei_a920bl_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/ratixifo/reritaz.pdfIn PDF document text
    • https://s3.amazonaws.com/rogugagatuf/superdry_joggers_size_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/mamibis/14744538736.pdfIn PDF document text
    • https://s3.amazonaws.com/jolituzoji/94978914946.pdfIn PDF document text
    • https://s3.amazonaws.com/sivanira/45542940670.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a51047b2-2287-4ec2-98fc-b841c8ca30b0/24796498593.pdfIn PDF document text
    • https://s3.amazonaws.com/wovisak/smoke_effect_brushes_for_photoshop_free.pdfIn PDF document text
    • https://s3.amazonaws.com/lemerisinivum/49630336979.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6685b220-a379-40eb-9a1f-6a1424cd38ea/20520288541.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_off0000e2fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2FD 5056 bytes
SHA-256: 5c485f2b6635169e141b0e52bde31d9688a8d2593e2f63a495f815738f327d8b
font_01_sfnt_off0000f437.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF437 10588 bytes
SHA-256: b5a1b548a3e1bfe164fc91b7ad7ac5e9adfbfd50585015fa5dd535ebf3924f2e

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