Malicious PDF — malware analysis report

Static analysis result for SHA-256 5903727df58ac434…

MALICIOUS

PDF

72.3 KB Created: 2021-01-24 22:07:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 25402a0501a49c2564b8b79c4571c9c6 SHA-1: 4eca975d2bac92eee9c7f5f38fb073ef3e3e34ef SHA-256: 5903727df58ac43444ad7c23d80ee036731c708f558b203977c4486b66a85022
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous external URLs, many of which are hosted on disposable domains and utilize UTM parameters, suggesting a campaign to redirect users to malicious content. The presence of embedded URLs and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://crophysi.ru/123?utm_term=osrs+new+bounty+hunter+guide PDF link annotation
    • https://cdn.sqhk.co/levowexesu/jdaiaYE/t_mobile_tuesdays_app_code.pdfIn PDF document text
    • http://robinmani.site/safety_first_forward_facing_car_seat_installationlm947.pdfIn PDF document text
    • https://cdn.sqhk.co/tuteremekome/dtjhidW/molafotisulimosedu.pdfIn PDF document text
    • http://copyright-services-us.com/korerodilixidama0sopb.pdfIn PDF document text
    • https://venatijaw.weebly.com/uploads/1/3/4/6/134680547/geripazo.pdfIn PDF document text
    • http://cookwellbakewell.com/pemenowabukabadevofjyy3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387699/normal_600d823def477.pdfIn PDF document text
    • http://axecheat2.xyz/dream_tiles_piano_bts_2020_apk7odq5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461204/normal_5ff8c337e8a19.pdfIn PDF document text
    • http://iblack.space/wasazabulotizusedufaxunimbzb5u.pdfIn PDF document text
    • http://znakomstva69.space/50162329240gltz2.pdfIn PDF document text
    • http://lunesygets.xyz/potion_of_stone_giant_strength_5egzn6y.pdfIn PDF document text
    • http://clobuss.ru/86466730617jobee.pdfIn PDF document text
    • https://cdn.sqhk.co/zisuzunon/idFhgQC/90_s_hits_listen_online.pdfIn PDF document text
    • http://org-fruit.space/wardrobe_furniture_designs_picturesmyxmx.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e057.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE057 5208 bytes
SHA-256: 331d0caf00eeea5f501ba8a24d778b47f83eac0adb6d4b3afc757fb17558c6fd
font_01_sfnt_off0000f216.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF216 10088 bytes
SHA-256: bf05f7afab186051f58f6f95888e05a5207f743af305f7354ade5832d7424200

Open this report in the interactive analyzer, or submit your own file for analysis.