Malicious PDF — malware analysis report

Static analysis result for SHA-256 36d5abd7b6b19601…

MALICIOUS

PDF

79.6 KB Created: 2021-03-21 08:47:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f01ca021c700cc0f405bf2bf64a4aad9 SHA-1: 38bcfcc73b55569dabf026f50b75826e493ae60b SHA-256: 36d5abd7b6b1960199607df6fbefdeb651a3faecf7771a718e5a111104061f98
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one specifically pointing to 'resalured.ru/wix?keyword=how+to+edit+apk+files+on+mac', suggesting a lure to a malicious site. ClamAV detected this as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. The presence of embedded URLs and the link farm heuristic indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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://resalured.ru/wix?keyword=how+to+edit+apk+files+on+mac
    • https://cdn.sqhk.co/gadukupuwe/cHggiiY/7024337783.pdf
    • https://cdn-cms.f-static.net/uploads/4449419/normal_602028ae839e0.pdf
    • http://universityru.fun/ruvinejepzwn7s.pdf
    • https://marexuja.weebly.com/uploads/1/3/6/0/136056735/1794796.pdf
    • https://cdn-cms.f-static.net/uploads/4368756/normal_6026ec3e6b255.pdf
    • https://cdn-cms.f-static.net/uploads/4461232/normal_603c0ca24b37d.pdf
    • http://dvestideyli.xyz/schlage_camelot_entry_door_handle6dbzo.pdf
    • https://lakubamovoto.weebly.com/uploads/1/3/0/7/130776542/bebodawusuv.pdf
    • https://static.s123-cdn-static.com/uploads/4375699/normal_5fc9438918f5c.pdf
    • https://xuvelufuxilo.weebly.com/uploads/1/3/5/3/135387868/lizifosuwa.pdf
    • https://vemubofopelo.weebly.com/uploads/1/3/0/7/130776521/mewedek_mopikewijiwab_jugutobizozu_dominudegi.pdf
    • https://cdn.sqhk.co/bilanogakiw/Gihrjg2/kozakivezonozowotara.pdf
    • https://cdn.sqhk.co/wareberefiz/geEm3hc/pac_man_championship_edition_2_plus_review.pdf
    • https://cdn.sqhk.co/kivipemo/Dvidgjl/android_nougat_32_bit.pdf
    • http://spindlndou.space/how_to_record_dividends_in_sage_506ljz6.pdf
    • https://kavixonew.weebly.com/uploads/1/3/4/5/134592395/1224103.pdf
    • https://cdn.sqhk.co/puwipaneke/I4WTgdM/applock_pro_fingerprint_pin_mod_apk.pdf
    • http://getchambre.xyz/marketing_entry_level_jobs_nycd0njj.pdf
    • https://cdn-cms.f-static.net/uploads/4474449/normal_602929ef1566b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/xupimaral/forensic_psychological_report_sample.pdf
    • https://s3.amazonaws.com/jaxesabi/blount_disease_adalah.pdf
    • https://uploads.strikinglycdn.com/files/d35b95ba-2dcf-4cc8-b741-7327e0f302e1/what_does_chinese_character_zai_mean.pdf
    • https://uploads.strikinglycdn.com/files/ce291b67-2812-47a7-a57d-9fc515d0e5e5/konuwefutanavix.pdf
    • https://uploads.strikinglycdn.com/files/8eb01b95-d0cb-47ad-8f2e-08aca2baa394/simula.pdf
    • https://s3.amazonaws.com/fowonaxul/moving_coil_ballistic_galvanometer.pdf
    • https://s3.amazonaws.com/minabiwa/ventricular_septal_defect_medical_report.pdf
    • https://s3.amazonaws.com/vebenok/platformio_upload_port.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_off0000f8cc.bin
eee88f42be3ad1c81916902bd65570ca88f5a97bba34ec400637fddfb2a50f6e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF8CC 5324 bytes
font_01_sfnt_off00010af3.bin
167efdff43686317267a1bf9fa16c54a1057666d0d4830f5583dde7f201fb4ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10AF3 10984 bytes

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