Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ba71e3fd0a65066…

MALICIOUS

PDF

78.8 KB Created: 2021-03-29 08:03:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 05bcfdb1e956a5bf7b8523e3e02129c6 SHA-1: eb7c2a3864f08b621215589fd0fb0e6d67602772 SHA-256: 1ba71e3fd0a650662b8fbde09278173000109017eac3509fa390fcefd932e668
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 0.9998

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://nipisod.ru/wix?keyword=wave+cut+platform+diagram PDF link annotation
    • https://cdn.sqhk.co/zuxosutuku/ihha3Mr/messages_sms_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/givesaxi/fgfyhcW/piclab_photo_editor_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393036/normal_60205fa677a8d.pdfIn PDF document text
    • https://veponigizut.weebly.com/uploads/1/3/0/9/130969631/92a946a7.pdfIn PDF document text
    • https://cdn.sqhk.co/lixabanitav/hfDdc83/xopus.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413563/normal_60414cdbcff94.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496607/normal_5fedce348da42.pdfIn PDF document text
    • http://pavuzebeveju.22web.org/event_planner_template_word.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474449/normal_604cd6dad9326.pdfIn PDF document text
    • https://cdn.sqhk.co/jaxabofapuw/ichighi/yandex_disk_windows_download.pdfIn PDF document text
    • https://cdn.sqhk.co/remimidotomi/Vifids2/forgotten_tales_rpg_map.pdfIn PDF document text
    • https://xavamukunakupa.weebly.com/uploads/1/3/1/4/131437969/8939296.pdfIn PDF document text
    • https://cdn.sqhk.co/xolokenuw/hi6lZic/inside_out_music_notes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493198/normal_60601d78b312e.pdfIn PDF document text
    • https://cdn.sqhk.co/zokoxirinuz/rtiejja/vebemaxotox.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dojufeme.epizy.com/wibokiximanamojot.pdfIn PDF document text
    • http://zuvuvejuxika.epizy.com/22545164933.pdfIn PDF document text
    • http://wivufaw.epizy.com/vigixaxevirudilafuzek.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn 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_off0000e25a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE25A 5372 bytes
SHA-256: 42434e159facbde21a9f40ffbcdbbbe6371ea7f271d2d135e42cfff6ffc2a927
font_01_sfnt_off0000f49e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF49E 10400 bytes
SHA-256: db3855bd7d39fc01c1537e88a63c8dc4078bc676c237d2ce8243c67c2aa0fbbd
font_02_sfnt_off00011883.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11883 16204 bytes
SHA-256: a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd

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