Malicious PDF — malware analysis report

Static analysis result for SHA-256 abab8fad5b104dfd…

MALICIOUS

PDF

80.5 KB Created: 2021-03-30 05:36:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1641c3cf856b6a4953f5e5a3eacd7bff SHA-1: 034ed5b11c13f8edb49f063323fe97319623ceab SHA-256: abab8fad5b104dfdfba526980aecad892d54fe8216e2102baba6f3f0adb0e774
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, identified as a link farm, suggesting an attempt to drive traffic to malicious or SEO-spam sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and heuristic firings point towards a malicious document designed to exploit user trust.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://dafemum.ru/award?keyword=adobe+acrobat+8+professional+editing+pdf
    • https://vetaroxavobu.weebly.com/uploads/1/3/4/4/134441067/e9df3c3940103.pdf
    • https://cdn.sqhk.co/moserusoba/6hhKIjc/fake_girlfriend_call_apk.pdf
    • https://lafumunokude.weebly.com/uploads/1/3/4/6/134666321/viwuwawe_lexiwax.pdf
    • https://sovejugi.weebly.com/uploads/1/3/4/6/134652237/d26b5.pdf
    • https://cdn.sqhk.co/dinigivo/jCjhMig/vagemotowugenirefa.pdf
    • https://gazewowotom.weebly.com/uploads/1/3/4/6/134616189/kewowu.pdf
    • https://gudivolopuna.weebly.com/uploads/1/3/5/3/135346868/kitifowo-fojanos.pdf
    • https://totofogekof.weebly.com/uploads/1/3/5/3/135327731/8a4161ad4a3ac.pdf
    • https://fudaxanoduvilu.weebly.com/uploads/1/3/4/6/134626593/nexeneji.pdf
    • https://gededojoseg.weebly.com/uploads/1/3/4/3/134341448/35616cc82e2.pdf
    • https://cdn.sqhk.co/jukelifawap/gfpgfLE/4476621709.pdf
    • https://cdn.sqhk.co/tosobulig/aHhBVih/xerolasivofasikulusize.pdf
    • https://xigobiniliw.weebly.com/uploads/1/3/5/2/135298108/dd7ee34.pdf
    • https://volinamonapefez.weebly.com/uploads/1/3/4/4/134494747/kuvogofenowe.pdf
    • https://lokawinopigu.weebly.com/uploads/1/3/2/7/132712062/liriw.pdf
    • https://kelonefak.weebly.com/uploads/1/3/2/6/132683111/vulef.pdf
    • https://sekikeke.weebly.com/uploads/1/3/4/7/134739811/komarejokebete.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://6ba7316d-b84b-4ccb-a32a-103c856d4013.filesusr.com/ugd/91f37e_381446dbb0914cc68b9762d3b00b4d22.pdf?index=true
    • https://11f44e1d-c86f-4be6-baa1-90970e7c24f5.filesusr.com/ugd/a298ce_ef7fe00c64ca44f381598faab2033d97.pdf?index=true
    • https://s3.amazonaws.com/jenisozazewubo/makalah_sejarah_peradilan_agama_di_indonesia.pdf
    • https://s3.amazonaws.com/muvemasoxaji/90993800887.pdf
    • https://a72a44ae-2aae-4d6a-a6c4-235301d0a62e.filesusr.com/ugd/57436b_24694335147146aaa768c24f2b543a3a.pdf?index=true
    • https://s3.amazonaws.com/sevoga/nikon_coolpix_s3300_charging.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_off0000ef15.bin
63563060c6570579f638d523f61406f47946cd99e1aa8f16531749c465245d60		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF15 5644 bytes
font_01_sfnt_off00010252.bin
3479e02f7746f772175a3fd423264d3277508cc8768e5da16fcee3324a9e669c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10252 20596 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.