Malicious PDF — malware analysis report

Static analysis result for SHA-256 aabe56bd746d5194…

MALICIOUS

PDF

70.1 KB Created: 2021-09-30 18:53:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 8896368a8233492723c38b0fb39d0201 SHA-1: d946c803c2a61de0683300bfcab30b661fcd750c SHA-256: aabe56bd746d5194fc9c71ca40292b69d1df41dfb3a48cd108263fa0a72b4823
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs that point to disposable hosting and function as a link farm, a common tactic for phishing or distributing further malware. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly indicates a malicious intent to redirect users through multiple low-reputation domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://crysiq.ru/uplcv?utm_term=voice+changer+apk+mod PDF link annotation
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614c0fcb8e41b---1177353417.pdfIn PDF document text
    • http://nwatchonline.com/userfiles/file/47381062686.pdfIn PDF document text
    • http://theorientgarden.iorderfoods.com/uploads/files/megototijiberuzifu.pdfIn PDF document text
    • http://emploi.nat.tn/ckeditor/ckfinder/userfiles/files/30929230424.pdfIn PDF document text
    • http://stacjaregeneracja.pl/userfiles/file/77919149379.pdfIn PDF document text
    • https://ksboutlet.com/file/files/wapexopila.pdfIn PDF document text
    • https://vinamex.info/uploads/news_file/rokupigirazakowezakugo.pdfIn PDF document text
    • http://arc-en-cielproduce.com/ckfinder/userfiles/files/98021201636.pdfIn PDF document text
    • http://xn--sanitrprofi-p8a.ch/fckeditor/editor/images/file/69041552620.pdfIn PDF document text
    • http://luluscafeonline.com/uploads/files/sadezutamozarokinobenafi.pdfIn PDF document text
    • http://namlinhchisapa.com/userfiles/image/file/sodutikawiv.pdfIn PDF document text
    • http://jimsclub.net/new/board/img_tinfo/file/20210916015802.pdfIn PDF document text
    • http://www.520amis.com/upload/files/52080488111.pdfIn PDF document text
    • http://bbmeti.it/userfiles/files/bomezebugu.pdfIn PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/931f043ec2ee62e77a25309a562023f9/fugajakobelazubami.pdfIn PDF document text
    • http://chupanhnoithat.vn/upload/files/26333135098.pdfIn PDF document text
    • https://ndmoyun.com/calisma2/files/uploads/xuzaf.pdfIn PDF document text
    • https://www.traitagri-solutions-alternatives.fr/ckfinder/userfiles/files/85416921391.pdfIn PDF document text
    • http://hoinhikhoavn.com/img/files/79227172828.pdfIn PDF document text
    • http://somsit.com/ckfinder/userfiles/files/wamunununapogerejiwujas.pdfIn PDF document text
    • https://chilegastronomia.cl/uploads/userfiles/files/8725533911.pdfIn PDF document text
    • http://soc-in.com/data/media/files/midarafuwuxujigoxom.pdfIn PDF document text
    • http://2015.letnifestiwal.pl/ckfinder/userfiles/files/22091793026.pdfIn PDF document text
    • http://otczenacts.com/media/files/vowabofuloboge.pdfIn PDF document text
    • http://villaelen.it/userfiles/files/98664150637.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b3ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3EC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cbfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBFE 15132 bytes
SHA-256: e274ac757eee37ffa33110ffbad01d75f83e02c771e52bb8bfd97b769a636889
font_02_sfnt_off0000f273.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF273 10712 bytes
SHA-256: c96b49e29d6a394edbc1df3ae8e104dedb0f2ab5593c8331ecde0ab5c057300f