Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cfc63f64ecf665a…

MALICIOUS

PDF

77.7 KB Created: 2021-04-05 08:03:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e5502584f7bbea6386a290b194e8b000 SHA-1: 90cea66616dc77fe4febe0c667e43da690099444 SHA-256: 1cfc63f64ecf665ad8267118fccf4d8306e2906189bdf680e46c7d8f25e49c3f
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 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
  • 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://seumenha.ru/strik?utm_term=how+to+set+profit+target+in+thinkorswim PDF link annotation
    • https://wexotagupoma.weebly.com/uploads/1/3/2/8/132814474/29233001dd76d1.pdfIn PDF document text
    • https://sefewazugep.weebly.com/uploads/1/3/5/2/135293251/e05d0.pdfIn PDF document text
    • https://cdn.sqhk.co/rijomawonuj/c4ggjfD/crusader_kings_iii_battles.pdfIn PDF document text
    • http://vuvafasanadiwi.iblogger.org/ethnicity_meaning.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414153/normal_5ffb7924ac5cf.pdfIn PDF document text
    • https://sifobidegi.weebly.com/uploads/1/3/0/8/130874382/milarexi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407571/normal_60294a9c300d3.pdfIn PDF document text
    • https://povemiloten.weebly.com/uploads/1/3/4/6/134608376/baroj.pdfIn PDF document text
    • https://kozugirufeji.weebly.com/uploads/1/3/4/8/134884007/3de274e.pdfIn PDF document text
    • https://cdn.sqhk.co/napumefu/cyicgx5/ganimisilefosuzo.pdfIn PDF document text
    • https://cdn.sqhk.co/pimidima/w0Sghlw/31481346615.pdfIn PDF document text
    • http://delavivajew.22web.org/the_prayer_of_jabez_song.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450890/normal_6056a64db79b6.pdfIn PDF document text
    • https://sazujusa.weebly.com/uploads/1/3/4/6/134632778/248b41222c.pdfIn PDF document text
    • https://cdn.sqhk.co/kawiwitifa/jhdiegh/android_9_android_auto_night_mode.pdfIn PDF document text
    • https://rikusinifo.weebly.com/uploads/1/3/4/0/134017093/ropepa-pufesenove-buxujojena-jumoduwatete.pdfIn PDF document text
    • https://dubitofux.weebly.com/uploads/1/3/4/4/134458445/gegudukel.pdfIn PDF document text
    • https://cdn.sqhk.co/sanevujaguda/djfHlia/vugufemopifevusetugimod.pdfIn PDF document text
    • https://dorikorojuj.weebly.com/uploads/1/3/3/9/133987202/naxolubofu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475571/normal_5ffacba8ecded.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/wuwabobujasivor/gafojofevenitadorije.pdfIn PDF document text
    • http://bidififi.rf.gd/declarao_alma_ata_1978.pdfIn PDF document text
    • https://s3.amazonaws.com/fajixe/canon_mf_toolbox_4._9_driver_free.pdfIn PDF document text
    • https://s3.amazonaws.com/nitizobuv/logitech_g_saitek_x52_flight_control_system_review.pdfIn PDF document text
    • http://deroselewem.epizy.com/35018721762.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_off0000f05e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF05E 5400 bytes
SHA-256: a30dac84682a2b40ec2131d7104d3fd783eeacde6706aa80de825b3e9ef3e546
font_01_sfnt_off000102a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102A6 11256 bytes
SHA-256: 87c556df9f101e9667e4608c71d3ad2600d39df539b48d0722e7d433da1f4c72

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