Malicious PDF — malware analysis report

Static analysis result for SHA-256 b32dfcbb0d418dd9…

MALICIOUS

PDF

69.7 KB Created: 2021-02-20 17:30:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: c1f93fc63987938a65bce65c7faddea3 SHA-1: 110645f5b187a05fda22639a2eec4401dc966212 SHA-256: b32dfcbb0d418dd9971894337a071a06faf6ac86b4a974a27c58a8a7fcb2edd6
174 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a phishing or trojan-like behavior. The document body contains garbled text but the presence of numerous external URIs, some pointing to disposable hosting and employing UTM parameters, suggests a link farm or phishing lure. The heuristic 'SE_LOLBIN_RUN_COMMAND' indicates potential execution of commands, likely facilitated by embedded JavaScript, which is common for PDF-based malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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/strik?utm_term=minolta+srt+102+price PDF link annotation
    • https://rujunile.weebly.com/uploads/1/3/2/7/132710621/terisujiget-jozat-rabibibavu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483586/normal_5fcc48e5019ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380707/normal_5fd626546e431.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477386/normal_5ff1c086537a5.pdfIn PDF document text
    • https://cdn.sqhk.co/gadujotev/ihmcjcK/64058806994.pdfIn PDF document text
    • https://bekazavaf.weebly.com/uploads/1/3/5/3/135327011/bitamebopupej-remunipexo-nixipa.pdfIn PDF document text
    • http://leoidet.xyz/free_printable_blank_bingo_cards_templatejv53s.pdfIn PDF document text
    • https://cdn.sqhk.co/ruvonusebex/ihaVIjb/mandatory_face_masks_walmart_canada.pdfIn PDF document text
    • https://wezoduvum.weebly.com/uploads/1/3/4/0/134096245/6547727.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375340/normal_5feb6d83963d3.pdfIn PDF document text
    • https://cdn.sqhk.co/revowemerem/dihnJbu/last_cloudia_tier_list_september_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/fegojujor/R1C3Egf/71345669864.pdfIn PDF document text
    • https://rasozonikazip.weebly.com/uploads/1/3/4/9/134904665/zuxosetesobakis.pdfIn PDF document text
    • https://cdn.sqhk.co/marebilan/cMDihia/kerumasojupagalegajot.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387921/normal_5fe951e85063f.pdfIn PDF document text
    • https://cdn-cms.f-static.nIn macro / runtime command snippet
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sedowedi/81346428445.pdfIn PDF document text
    • https://s3.amazonaws.com/dazemi/35538612874.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d1ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1AE 5256 bytes
SHA-256: 95ac0c7a39eb961ac0c12f8910d996179ae57bbf8e0b100baa146efc2ba01a85
font_01_sfnt_off0000e3a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3A9 11184 bytes
SHA-256: 62ff1ef65cfc0d12e57d755eb6e7dc9dbb3f8d6204e6c96a40d6fd90dd6a12f1

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