Malicious PDF — malware analysis report

Static analysis result for SHA-256 60ccf10d7de2b8d6…

MALICIOUS

PDF

77.3 KB Created: 2021-04-05 20:00:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6b6e290ff2a517e4a32e41f636b2c6e0 SHA-1: 8f39a475285026daaa1e5b30e31df525edae5182 SHA-256: 60ccf10d7de2b8d6c54775413f6ab9dfc236e1685ba5843d9381f892a586aef5
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one prominent URL leading to 'fokemale.ru' disguised as a search result. This suggests a phishing or content-luring scheme. The presence of a PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, likely to manipulate search engine rankings or distribute malicious content. ClamAV also detected this file as Pdf.Phishing.Trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://fokemale.ru/strik?utm_term=what+is+the+easiest+fishing+knot+to+tie
    • https://cdn-cms.f-static.net/uploads/4422378/normal_600cf010ae917.pdf
    • https://cdn.sqhk.co/gejixoneku/3tgfgdf/mawekiwoxogow.pdf
    • https://cdn-cms.f-static.net/uploads/4414515/normal_60479d316ae67.pdf
    • https://static.s123-cdn-static.com/uploads/4372073/normal_5fe1bf6c1f07b.pdf
    • https://cdn.sqhk.co/patagarinixa/fjiheYy/nhl_playoff_bracket_2020_dates.pdf
    • http://delojenopow.66ghz.com/wujajapesutimu.pdf
    • https://cdn.sqhk.co/nurijodefa/fGhhCgc/89789453789.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://336ddc11-c37d-4cd6-9685-7accad2975f7.filesusr.com/ugd/479fa9_fa59aba49f4445f48150703de1a075cf.pdf?index=true
    • http://dawijafedupu.rf.gd/jepuzipeluzib.pdf
    • https://s3.amazonaws.com/tokit/18060373831.pdf
    • https://s3.amazonaws.com/wudibirewuduto/hp_photosmart_7200_printer_cartridges.pdf
    • https://s3.amazonaws.com/titugome/vanoretivixamemimatobewu.pdf
    • https://s3.amazonaws.com/webipejonavuv/nevej.pdf
    • http://zelavejifokekoj.epizy.com/51669630087.pdf
    • https://e4fb9bf1-a3d6-4767-9bf2-2a1021e5dc09.filesusr.com/ugd/53cfc7_ffcc3a841b7d4708b8b70e5825d7a181.pdf?index=true
    • https://s3.amazonaws.com/dapekufoxiraku/43525739027.pdf
    • https://s3.amazonaws.com/muxegeza/smoky_mountains_leaf_color_report.pdf
    • https://s3.amazonaws.com/kosipefojaw/26161965662.pdf
    • https://s3.amazonaws.com/zidenigad/pevivuwakurebijowo.pdf
    • https://7fe6b731-3703-45da-bcbe-faf39b4d3392.filesusr.com/ugd/880a7e_e1e5704b014d430b9fa5051591e11a4b.pdf?index=true
    • http://sudonek.epizy.com/76301046155.pdf
    • https://s3.amazonaws.com/leributafa/alcatraz_prison_escape_mod_apk.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_off0000f16e.bin
0571b88f69a6548a7df7086363dc7648b09bc08f8a9d177cae3ffa74e6a7e096		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF16E 4980 bytes
font_01_sfnt_off00010275.bin
5c8ce52d8fcb93c1377fe80341bc4609a02ce1e3f8e9052ca943a1ce5264919d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10275 11012 bytes

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