Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a0be7745b00a6b9…

MALICIOUS

PDF

77.9 KB Created: 2021-01-24 03:25:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 5def1fd946135447b879e5c58c3b7f37 SHA-1: dd0b6ee0322b36412729f97b5f021ece6e227a7d SHA-256: 7a0be7745b00a6b9e40fbdf55bf21ac3e294bb44cafaf9e77d22224aff16232e
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The document body, though truncated and obfuscated, contains text related to 'profile app review' and includes numerous URLs, many pointing to disposable hosting. One prominent URL, 'https://bologen.ru/123?utm_term=who+viewed+my+profile+app+review', strongly suggests a phishing lure related to social media profile viewers. The presence of many external URIs and the link farm heuristic indicate an attempt to redirect users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://bologen.ru/123?utm_term=who+viewed+my+profile+app+review PDF link annotation
    • https://site-1175951.mozfiles.com/files/1175951/91433670328.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382953/normal_5fdc423d0cd1d.pdfIn PDF document text
    • http://xugafigipi.22web.org/akkada_photo_chinnavada_songs.pdfIn PDF document text
    • https://site-1178096.mozfiles.com/files/1178096/89320454887.pdfIn PDF document text
    • https://cdn.sqhk.co/wibononuve/fXjhVmv/hockey_predictions_for_today.pdfIn PDF document text
    • https://cdn.sqhk.co/verexumifo/xgd1A2b/negivusuximadiborugazo.pdfIn PDF document text
    • https://site-1177991.mozfiles.com/files/1177991/94062924118.pdfIn PDF document text
    • https://site-1177842.mozfiles.com/files/1177842/ingresar_plataforma_blackboard_policia_nacional.pdfIn PDF document text
    • http://fezelaradelemuj.22web.org/fakajikodisigafewav.pdfIn PDF document text
    • https://cdn.sqhk.co/supesuvepo/hagfjj9/33538528080.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
    • http://zezevefo.rf.gd/fovuwebavowisufowubiribi.pdfIn PDF document text
    • http://voxotili.epizy.com/apa_format_references_book_chapter.pdfIn PDF document text
    • http://fulawumobolofog.epizy.com/sylvania_auto_lamp_replacement_guide.pdfIn PDF document text
    • http://woxutonugosafer.epizy.com/72472931895.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e747.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE747 4972 bytes
SHA-256: c856e3ae9fb27a4c6043f448fad3540973441c1a559ff74d5684b583f94cfad4
font_01_sfnt_off0000f846.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF846 10496 bytes
SHA-256: c0504d8dab8172a15f088ea5c5a36932b9a222374e6e1b72c314c4c84d0f7c90
font_02_sfnt_off00011c35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C35 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

Open this report in the interactive analyzer, or submit your own file for analysis.