Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdf1a0ce191bcd30…

MALICIOUS

PDF

75.9 KB Created: 2021-03-20 00:53:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 55ae34e69a81c4036b3420da6896b168 SHA-1: 54784b55423f56140d1d5538e5517a358182f75e SHA-256: cdf1a0ce191bcd30a40c1a49c3f762846039c8e11b2f1c8f82f137f5ebf8e74b
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9992

Heuristics 6

  • 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.
  • 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://xezojetit.ru/strik?utm_term=como+se+reza+el+rosario+dela+divina+misericordia PDF link annotation
    • https://cdn.sqhk.co/tutabalero/gNijagg/unblocked_games_66_zombie_apocalypse_2_hacked.pdfIn PDF document text
    • https://cdn.sqhk.co/kunimanujage/hfgg4gg/36603161696.pdfIn PDF document text
    • http://buwubaled.mywebcommunity.org/52076087256.pdfIn PDF document text
    • http://lebedugipul.mywebcommunity.org/15185120421.pdfIn PDF document text
    • https://cdn.sqhk.co/mujekesire/isafjcO/glitch_video_effect_photo_video_editor_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366055/normal_5ff75a6f3dcf6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386837/normal_6004fe62a2c3a.pdfIn PDF document text
    • https://cdn.sqhk.co/pulovafafita/hcic6je/61861563859.pdfIn PDF document text
    • https://cdn.sqhk.co/jilebodetifa/ejjridL/saxuj.pdfIn PDF document text
    • https://rigawegafo.weebly.com/uploads/1/3/4/5/134587157/defutopagunad-widugasotujex-sasobek-xuwog.pdfIn PDF document text
    • http://kitafoged.medianewsonline.com/zusujelalefigo.pdfIn PDF document text
    • https://mabalajobiken.weebly.com/uploads/1/3/4/0/134016714/5193233.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389090/normal_600d796690a3f.pdfIn PDF document text
    • https://cdn.sqhk.co/sazipuvaxiv/ifUherP/pretty_girl_shake_it_lyrics.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407784/normal_5fcbfa3155676.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382620/normal_603e4e3235bdf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kewetanetoza.atwebpages.com/24761719741.pdfIn PDF document text
    • https://s3.amazonaws.com/kobivimelelo/hp_deskjet_f4580_ink_cartridge_error.pdfIn PDF document text
    • https://s3.amazonaws.com/numunenoji/22264692958.pdfIn PDF document text
    • https://s3.amazonaws.com/kisimujuk/75380919534.pdfIn PDF document text
    • https://s3.amazonaws.com/jazamerijekufol/7495601890.pdfIn PDF document text
    • https://s3.amazonaws.com/juwofuxufijup/critical_thinking_skills_for_dummies.pdfIn PDF document text
    • http://pozijawikubinun.myartsonline.com/makepisivamogaximepim.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_off0000e79f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE79F 5100 bytes
SHA-256: 790a4b5378876fe645f54a6b4b209bdc54bb4df8eb0ba844e02a10e5b47a8297
font_01_sfnt_off0000f8e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E6 12016 bytes
SHA-256: 8060740e051c62d23c0436f3f79e8159441676bd9cc2c71c80fb48d72c1b1195

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