Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed891cdad6100245…

MALICIOUS

PDF

80.7 KB Created: 2021-01-23 01:59:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 5822acf071588c755eac5b77c45120f4 SHA-1: 9b599241459996d593e0ca61a3596f8321184840 SHA-256: ed891cdad61002454738728bc8992c7dde387dcda2feb91166d96f47bedc841d
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic suggests it's part of a link farm designed to host malicious content. The embedded URL `https://maypoin.ru/123?utm_term=your+freedom+premium+account+apk` is the primary indicator of the phishing lure, aiming to trick users into downloading a file. No scripts were extracted, but the overall structure and URL suggest a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://maypoin.ru/123?utm_term=your+freedom+premium+account+apk PDF link annotation
    • https://site-1174749.mozfiles.com/files/1174749/smashed_potatoes_with_cream_cheese.pdfIn PDF document text
    • https://cdn.sqhk.co/zidexamuwela/awjdCuP/67733347971.pdfIn PDF document text
    • https://cdn.sqhk.co/gavivevok/1Sjaogd/73884836484.pdfIn PDF document text
    • https://cdn.sqhk.co/nemanive/9IjghgZ/xemezepini.pdfIn PDF document text
    • http://bovosidifusu.iblogger.org/wujotunonubojeraper.pdfIn PDF document text
    • https://cdn.sqhk.co/baxemazisod/fQDOjjE/stickman_warriors_super_dragon_ball_hack_apk.pdfIn PDF document text
    • https://site-1248735.mozfiles.com/files/1248735/bein_live_hd_apk.pdfIn PDF document text
    • https://site-1204510.mozfiles.com/files/1204510/2d_game_background.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
    • https://s3.amazonaws.com/nefomojuwet/38189545656.pdfIn PDF document text
    • http://tunazafagid.epizy.com/new_bollywood_movies_filmywap.pdfIn PDF document text
    • https://s3.amazonaws.com/xeroguru/wutujujatinovavapu.pdfIn PDF document text
    • https://s3.amazonaws.com/teximikamukubo/36058439966.pdfIn PDF document text
    • http://xegebasitez.rf.gd/format_ng_resume_tagalog_sample.pdfIn PDF document text
    • https://s3.amazonaws.com/sojaxub/jinja_template_if_true.pdfIn PDF document text
    • http://telawusufolij.epizy.com/bluebeam_revu_tutorial.pdfIn PDF document text
    • http://mowelafawugek.epizy.com/anandam_movie_songs_naasongs.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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC15 4996 bytes
SHA-256: 3cc6331332fa711ef64ea364ae073b74da553fac8832440c59328b32a1f3de6e
font_01_sfnt_off0000ecf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECF9 10548 bytes
SHA-256: f7d9f0eb39912ce6c919b3e9d201f60ce24741213ffd4d6e8cfb607fcf327c1e
font_02_sfnt_off0001118c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1118C 16164 bytes
SHA-256: d781c508aaf473e50263a6aabc3f4161b7fa10724c54bb8d35addee38a7f1c44
font_03_sfnt_off00012688.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12688 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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