Malicious PDF — malware analysis report

Static analysis result for SHA-256 74bb284e2541c392…

MALICIOUS

PDF

78.2 KB Created: 2021-03-14 19:58:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: b6ec7bf94374ad24a739d7fffe27ff84 SHA-1: 7c747730f095da249908b298a28466c49b058e87 SHA-256: 74bb284e2541c3928a316e69d914d6f1ee3571909cb7d718c948bf76520341f5
226 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic firings reveal it functions as a link farm, directing users to numerous external PDF files hosted on disposable domains, and includes a lure for a password-protected archive. This suggests a phishing or scam campaign where the user is tricked into downloading a password-protected payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://mezovuduw.ru/wix?keyword=beyblade+parts+names PDF link annotation
    • https://basivuto.weebly.com/uploads/1/3/4/6/134646412/15b7d3929.pdfIn PDF document text
    • https://cdn.sqhk.co/vusutesilo/hhAJThb/the_cruise_line.pdfIn PDF document text
    • https://wopokajam.weebly.com/uploads/1/3/0/8/130874492/1679394.pdfIn PDF document text
    • https://cdn.sqhk.co/fovomesit/ixlLzia/palupamalijatozu.pdfIn PDF document text
    • https://bituxusod.weebly.com/uploads/1/3/4/3/134347303/7c9b4.pdfIn PDF document text
    • http://rijupoxog.22web.org/across_the_stars_sheet_music_flute.pdfIn PDF document text
    • http://gitulozoripuk.22web.org/65312055521.pdfIn PDF document text
    • https://nowagomasililub.weebly.com/uploads/1/3/0/7/130775830/jovawoxamudep-jonijareze-niwomiwimub.pdfIn PDF document text
    • https://jogelobob.weebly.com/uploads/1/3/5/9/135961552/8496990.pdfIn PDF document text
    • https://tasidumil.weebly.com/uploads/1/3/2/6/132680907/guguluxexeb.pdfIn PDF document text
    • http://health-top.ru/sears_stackable_washer_and_dryer_partsnsfvv.pdfIn PDF document text
    • https://cdn.sqhk.co/wolebiduju/pxXhjQn/dengue_fever_blood_test_report_time.pdfIn PDF document text
    • http://gazzsheff.xyz/61831012245v0xs5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/jixerubowi/armored_warfare_assault_free.pdfIn PDF document text
    • https://s3.amazonaws.com/bokelur/2016_audi_q5_tdi_owners_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/kagedatabujo/aws_appsync_android_example.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e784.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE784 5024 bytes
SHA-256: 5312a6f2427ed10e56eee142b153f789c6651d6e6e66f4efe765b1fd5635e10c
font_01_sfnt_off0000f879.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF879 10988 bytes
SHA-256: 767465d5147ed560e377d470b93f224ebfe69075b3b7f4b955029b71a4128d35
font_02_sfnt_off00011e19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E19 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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