Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d38f3c7f2439c61…

MALICIOUS

PDF

86.1 KB Created: 2021-07-29 21:28:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: fdb9c3085a0e30af53c980c3e403e8dd SHA-1: 13836730005d52e3f3d42dead78b30869591502f SHA-256: 2d38f3c7f2439c615414121dd3aaa462f3c1f52effea9b4f4584768c17c4af2c
164 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on disposable domains or compromised CMS upload storage, suggesting a phishing or malware distribution scheme. The presence of a 'robinhood customer service' UTM term in one URL indicates a potential lure to impersonate a legitimate service. ClamAV detection and ML classification strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://wastran.ru/uplcv?utm_term=robinhood+customer+service+reddit PDF link annotation
    • http://georgekoldun.com/var/upload/file/93911223200.pdfIn PDF document text
    • https://amblamy.ee/upload/file/65288605267.pdfIn PDF document text
    • http://macabrey-luthier.fr/data/Files/57106624689.pdfIn PDF document text
    • http://dabaizhongxue.com/upload_fck/file/2021-7-3/20210703104351192507.pdfIn PDF document text
    • https://binarbaid.com/public_html/userfiles/file/tikemetabikew.pdfIn PDF document text
    • https://dialogueinpraxis.net/files/docs/texigizenepibebikuvenixo.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a1dc3eb40de---69115383895.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a095626c70---68881220571.pdfIn PDF document text
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/jonalovasulutolaruwik.pdfIn PDF document text
    • https://lederstuehle-shop.de/ckfinder/userfiles/files/ludizapixurujorij.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/44088541824.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/93815127137.pdfIn PDF document text
    • http://potlista.com/file/files/kapozinojemonumuve.pdfIn PDF document text
    • https://duocvinhkim.com/userfiles/file/80298682714.pdfIn PDF document text
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087345ee2945---37812916580.pdfIn PDF document text
    • http://local-minicab.com/survey/userfiles/files/nubonumezipesog.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/c2b5bacbb0d85151284f11197521adb8/palepotovoxaro.pdfIn PDF document text
    • http://lsbwg.com/ckfinder/userfiles/files/20210625/1825293774.pdfIn PDF document text
    • https://plasy.com/uploads/file/58354168378.pdfIn PDF document text
    • http://www.derbysignandgraphics.com/uploads/file/sutomuvizen.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bd7608732a---50502543438.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_off0000ec44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC44 10776 bytes
SHA-256: 0957835c7277699f6074c9d34523e64646ce5b3080ba73d543fe9cb069b5adde
font_01_sfnt_off000104e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104E4 17804 bytes
SHA-256: 3db592f38b9056650911b66f419c8b8072957b23531df280f263e6e9fdcc1786
font_02_sfnt_off00013305.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13305 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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