Malicious PDF — malware analysis report

Static analysis result for SHA-256 e679ba9aabfb9347…

MALICIOUS

PDF

81.6 KB Created: 2021-03-31 08:57:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: c72e0d2e8b05395f5ec86caf7ff9b895 SHA-1: ef25593a51be0619fe68720119c6d709be9b8b86 SHA-256: e679ba9aabfb934747707c9dcaee8840199b23f4a48e0c2164a19f45b8891f7b
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The document body, though truncated, contains text related to 'Dibujos para colorear de paw patrol pdf', indicating a lure to disguise the malicious intent. The ML classifier and ClamAV detection strongly indicate maliciousness, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://dugedepap.ru/award?keyword=dibujos+para+colorear+de+paw+patrol+pdf PDF link annotation
    • https://cdn.sqhk.co/mozoposowi/jhjhjwo/tuzakujamifesabineji.pdfIn PDF document text
    • https://cdn.sqhk.co/lidabofob/tiejbts/scoring_ticket_to_ride_europe.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/PibLjcP/clothes_worksheets_clipart.pdfIn PDF document text
    • https://cdn.sqhk.co/livulopo/0jgjfB7/furious_car_racing_mod_money.pdfIn PDF document text
    • http://vasuxarogaxatix.iblogger.org/black_desert_error_15001.pdfIn PDF document text
    • http://nesobaka9.xyz/37012543689ecjs6.pdfIn PDF document text
    • http://olymptrade.buzz/pexafofukizinij8hzof.pdfIn PDF document text
    • http://aires.fun/96186376287b5sd7.pdfIn PDF document text
    • http://beririka.scienceontheweb.net/50330711585.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pezukovurarugor.rf.gd/68561702127.pdfIn PDF document text
    • https://ecc4b077-82d2-4cf1-ad45-1e482560a890.filesusr.com/ugd/5d7ac5_8f84ea9e5ffb42c6908d548fee76a6ac.pdf?index=trueIn PDF document text
    • https://adc0bc6f-2b4d-4951-bce0-9128d215fa34.filesusr.com/ugd/5ea4d5_7d7ef881cc524bb496fa2d29d87186f1.pdf?index=trueIn PDF document text
    • http://zanulewetadom.epizy.com/canzoni_napoletane_accordi.pdfIn PDF document text
    • http://xoxekojut.onlinewebshop.net/how_to_fix_squeaky_engine.pdfIn PDF document text
    • https://2ddf8be6-044d-4f30-b6fd-16c032829cd6.filesusr.com/ugd/9827ea_5d47eac829674b50bcf3eb33259dc4ea.pdf?index=trueIn PDF document text
    • https://4a1cfc67-5981-466d-a13b-75576fe7431f.filesusr.com/ugd/64e449_fcc9bb67b7fd4b68b254a66c57253997.pdf?index=trueIn PDF document text
    • https://12f7643e-9106-4823-89c2-0bdaecd1bc22.filesusr.com/ugd/1f6d71_d6f5b1159fc44eb3b8b8fc2cf7eb26f9.pdf?index=trueIn PDF document text
    • https://4f65501f-cdae-4966-b9db-49b15ad9d196.filesusr.com/ugd/52b593_22fc369b7e9d4f9096b8d0b479f710b1.pdf?index=trueIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dad6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAD6 5456 bytes
SHA-256: a1a14e2ca7e99ade4701075b1b0646dd8f6295d7523437f1f9ae7c2b6b7f0c34
font_01_sfnt_off0000ed77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED77 2896 bytes
SHA-256: 904a7694502b8ec444e2d1359371b524f49fa949d2cc5b2e571045b4ebe64c5b
font_02_sfnt_off0000f97f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF97F 11544 bytes
SHA-256: bf2f17cca3e83dc4bbd5c0560381b4ab16c2a2effe8dde45cdc6a54ba22e6e24
font_03_sfnt_off00011feb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FEB 16764 bytes
SHA-256: 3388a1f0eb1594d43c72933a19aa5535e3adac9bdf88bd0ae9f6c43c8a38600d