Malicious PDF — malware analysis report

Static analysis result for SHA-256 d35f4807d6c6ba71…

MALICIOUS

PDF

66.6 KB Created: 2021-03-02 18:51:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 13a814ce80a89aabdaf37b0f3402ebcd SHA-1: b0f1e97cb2550402324a6f72859fc7bb62e69272 SHA-256: d35f4807d6c6ba715ec88ac353fb5e8550c3dcca19b394574f18cbe410c4d752
184 Risk Score

Malware Insights

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

This PDF document was identified as malicious by ML classifiers and ClamAV, flagging it as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially malicious content. The document body, though heavily obfuscated, appears to be a lure related to a "Kidde smoke alarm manual". No scripts were extracted from this sample, but the extensive use of external links points towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8274

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://gimoguvi.ru/strik?utm_term=kidde+smoke+alarm+manual+i4618 PDF link annotation
    • http://ru-order-687646765445.art/sansa_clip_4gb_batterybj985.pdfIn PDF document text
    • https://xasuzetevoke.weebly.com/uploads/1/3/2/6/132681443/nenujoneb.pdfIn PDF document text
    • http://affilateapp.online/94703091037xijpb.pdfIn PDF document text
    • https://valuzobuxile.weebly.com/uploads/1/3/2/7/132711949/c66f2c7c41651c.pdfIn PDF document text
    • https://cdn.sqhk.co/wubunepan/hgfFifW/repost_app_not_working.pdfIn PDF document text
    • https://cdn.sqhk.co/gutinisiv/Uv7w6ie/download_among_us_pc_mediaf_re_gratis.pdfIn PDF document text
    • http://com-signto5.xyz/55885168294gwl34.pdfIn PDF document text
    • https://cdn.sqhk.co/vutabopi/Vigsdgg/44863755433.pdfIn PDF document text
    • https://setuwome.weebly.com/uploads/1/3/0/8/130874340/24588d93d2b623.pdfIn PDF document text
    • http://pexiwaz.iblogger.org/adjectives_key_stage_2_worksheets.pdfIn PDF document text
    • https://niregesop.weebly.com/uploads/1/3/0/7/130776037/sojaw-lumukewusop-jutorazaf-lefemol.pdfIn PDF document text
    • http://popularchoice.space/pebawhu82x.pdfIn PDF document text
    • https://pamuguvijokogag.weebly.com/uploads/1/3/4/8/134883264/joman-vebasekapezu-pepuvuv-fitodogumarep.pdfIn PDF document text
    • https://cdn.sqhk.co/wifopuzuxiba/gcjcihF/nfl_rush_gameday_apk.pdfIn PDF document text
    • https://xezinaruwi.weebly.com/uploads/1/3/4/4/134479948/a2b0fc.pdfIn PDF document text
    • https://pupalizote.weebly.com/uploads/1/3/4/7/134716330/metifijuzuzij.pdfIn PDF document text
    • https://serelikiwep.weebly.com/uploads/1/3/4/4/134476809/127121.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://juruzimezez.rf.gd/are_smart_scales_dangerous.pdfIn PDF document text
    • http://zukewazidokik.rf.gd/26823343768.pdfIn PDF document text
    • http://bofetotazefonuv.epizy.com/97043763783.pdfIn PDF document text
    • http://jirizaxewusi.epizy.com/30501548883.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC3F 5492 bytes
SHA-256: 5d83eb2decf634602b6d415f8fd6b732978987d30e0e7b0b91d297b44e27b572

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