Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb2923e6584e257c…

MALICIOUS

PDF

69.5 KB Created: 2021-05-14 09:48:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: da402322e1f4cdb61ad62420a043bcf1 SHA-1: 706ce59e3dcab51060722750512b176646c6da51 SHA-256: cb2923e6584e257cf9587c0eca4d7d98ccf4a2cd507b3236ba5e2c3262a6b5c5
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://botokaw.ru/strik?utm_term=cuisinart+dlc-7+super+pro+work+bowl PDF link annotation
    • https://vokavubibobudew.weebly.com/uploads/1/3/5/3/135316357/girujipoja-deveze.pdfIn PDF document text
    • http://uaportal.site/shingeki_no_bahamut_virgin_soul_episode_1n5y1k.pdfIn PDF document text
    • http://ig-socialmedia.xyz/vegetarian_tortilla_soup_instant_pot_recipei9vyw.pdfIn PDF document text
    • https://jawonuvanez.weebly.com/uploads/1/3/6/0/136021807/9293c0767051.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486200/normal_60465b9a0aa71.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373301/normal_5fcdaa1ce7a81.pdfIn PDF document text
    • http://lunesygets.xyz/fifawewamajolumabo6b1cx.pdfIn PDF document text
    • http://duvejajenivogik.getenjoyment.net/laxubez.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446038/normal_604314983fec1.pdfIn PDF document text
    • http://biwiroxefamir.mywebcommunity.org/wufafiwod.pdfIn PDF document text
    • http://xozowilozoga.mywebcommunity.org/good_strength_crossfit_workout.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369907/normal_606c662d9669d.pdfIn PDF document text
    • http://prechambre.xyz/the_living_christmas_company_after_shark_tankc9gkc.pdfIn PDF document text
    • https://zagumukukawikam.weebly.com/uploads/1/3/4/6/134608037/226217.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368752/normal_60013b1f2dacc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464710/normal_6046785f3dd29.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368265/normal_5fc86a3496f5e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492253/normal_5ffe5204028bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476281/normal_60684ef088938.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/divelatoxa/19053268167.pdfIn PDF document text
    • http://nezugetojuf.myartsonline.com/jimemelovi.pdfIn PDF document text
    • https://s3.amazonaws.com/ragejufa/guide_michelin_paris_12.pdfIn PDF document text
    • http://gumizaxewa.atwebpages.com/convertir_small_para_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/risisipajole/suxizenan.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_off0000d195.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD195 5380 bytes
SHA-256: db92d19e8dc83fb0de47bc744c0b734d95aa7b52430cdc414e589d53c5c53099
font_01_sfnt_off0000e408.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE408 10608 bytes
SHA-256: d744707497f8229a3f5cac9194e848638b0d8e4f2424445dae148587a360b9d2

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