Malicious PDF — malware analysis report

Static analysis result for SHA-256 d09f9c8786946d83…

MALICIOUS

PDF

94.7 KB Created: 2021-03-21 23:19:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b64c26492e34be7bbe3bbddc7d95f6a9 SHA-1: 716ae8769ee3d5b4a91cbbb27343c32aba82252d SHA-256: d09f9c8786946d836d03cf777313725c249afb3d30e70c5edc451b95103669ed
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, detected by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. The ML classifier and ClamAV also flagged this file as malicious, specifically as a phishing trojan. While no scripts were extracted, the presence of numerous external URLs indicates an attempt to redirect the user to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://druttle.ru/wix?keyword=eating+dua+forget
    • https://cdn-cms.f-static.net/uploads/4417809/normal_604e688fdbefa.pdf
    • https://risenezapaf.weebly.com/uploads/1/3/4/4/134481661/39b9cc8a2c0d5.pdf
    • https://cdn-cms.f-static.net/uploads/4417675/normal_6017c3580d1c3.pdf
    • https://luvegiramoki.weebly.com/uploads/1/3/3/9/133986347/volizav.pdf
    • https://wepebajaka.weebly.com/uploads/1/3/4/5/134588919/3785807.pdf
    • https://fepapidatimupiv.weebly.com/uploads/1/3/1/4/131437812/mukugaxureteji.pdf
    • https://miwebuzoz.weebly.com/uploads/1/3/4/0/134095964/7102644.pdf
    • https://fitatopiwize.weebly.com/uploads/1/3/0/7/130739398/2025530.pdf
    • https://cdn.sqhk.co/jifedibodo/7ibmsJT/disney_castaway_cay_cabana_rental.pdf
    • https://cdn.sqhk.co/wejupexuput/dujahfr/nissan_connect_ev_app_uk.pdf
    • https://cdn.sqhk.co/tobepeliv/7URiegh/20794336046.pdf
    • https://kibewuzogoluwiw.weebly.com/uploads/1/3/1/6/131636689/ba3114fd154df9.pdf
    • https://cdn-cms.f-static.net/uploads/4527042/normal_603b374821207.pdf
    • https://lubozukutiximik.weebly.com/uploads/1/3/4/4/134472848/3519670.pdf
    • https://tujurexi.weebly.com/uploads/1/3/4/7/134743655/tizejojidaxizogese.pdf
    • https://cdn.sqhk.co/bajipugotox/iJTjjge/road_draw_bike_rider_position.pdf
    • https://faxufoxexukixel.weebly.com/uploads/1/3/4/4/134455740/kagoxatelube.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://puwomuf.rf.gd/bajrang_dal_video_song_free.pdf
    • http://tuguwobafadurot.rf.gd/caller_location_app_for_android_free.pdf
    • https://01c36edd-4624-43d2-a45c-450d276cddbf.filesusr.com/ugd/f34823_aec42e608cee4451b7d6d3fe424a9bce.pdf?index=true
    • http://fegifujeviba.epizy.com/guvepux.pdf
    • https://6f12065f-c45d-410c-b048-6ec23fb2b810.filesusr.com/ugd/02ccf7_6152a566b69747bbb01d5b88646d59d4.pdf?index=true
    • http://gofuwupe.epizy.com/gubevifupejinigunura.pdf
    • https://69a21580-3c80-4f81-8097-1ec0bc18215d.filesusr.com/ugd/bd7df1_3e9fd6c0e0944606817fd2a2eff69802.pdf?index=true
    • https://12c21f6a-324e-488c-af83-7e1076049286.filesusr.com/ugd/e84f25_0542afc13f3f4f86a19b85040149427a.pdf?index=true
    • https://c81c1a69-aec6-471c-ac34-7a6800eafc69.filesusr.com/ugd/9ef1ea_ae2b15c6d4634ec68ac8b912a5a5372c.pdf?index=true
    • 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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00013f0a.bin
b7a24164d3c07c69ef940f88c73a93a58f38778ec967bbfbe9bc32909c28b2f9		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x13F0A 24616 bytes
font_00_sfnt_off000108f9.bin
7c9d2eee7e2d44956b820da84ed7f54408aa4419b5fb7554c38328443d1b191a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x108F9 4820 bytes
font_01_sfnt_off00011971.bin
aa0e896f33572a739eb3a24cd08171d5c9f68e8e8d21c98ea18ee10d3db92e2a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11971 10988 bytes

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