Malicious PDF — malware analysis report

Static analysis result for SHA-256 96170adb582b7fce…

MALICIOUS

PDF

78.7 KB Created: 2021-01-17 08:39:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: fe4fbc52b1402d657f816410fbe35326 SHA-1: bfacb02af14cb7ae0c706e84e4fb29a361240f75 SHA-256: 96170adb582b7fce3d5812d5eb85d869ebb468995ea1fe3ef70c75d5e5cf2ed5
192 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded links, with one specifically identified as a known malicious redirector. The document body, though heavily obfuscated, suggests a lure related to SAP FICO transaction codes, aligning with phishing or malware distribution tactics. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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://traffmen.ru/123?utm_term=sap+fico+all+tcodes+list+pdf In PDF document text
    • https://site-1201024.mozfiles.com/files/1201024/vuvebaveliwu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417526/normal_5f9e7b5e8f09e.pdfIn PDF document text
    • https://site-1166673.mozfiles.com/files/1166673/diy_pom_pom_pokemon_book.pdfIn PDF document text
    • https://site-1206872.mozfiles.com/files/1206872/list_of_computer_full_form.pdfIn PDF document text
    • https://toripifisesu.weebly.com/uploads/1/3/4/3/134367164/bimaxomadarojijoti.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387810/normal_5f947f5d253b8.pdfIn PDF document text
    • https://site-1230768.mozfiles.com/files/1230768/fikidiliwuxaterudojirug.pdfIn PDF document text
    • https://pulimogub.weebly.com/uploads/1/3/4/3/134312020/wajul_puzedepi_gasakibobu_melovaginas.pdfIn PDF document text
    • https://site-1215102.mozfiles.com/files/1215102/practice_biogeochemical_cycles_answer_key.pdfIn PDF document text
    • https://site-1171784.mozfiles.com/files/1171784/auricularia_auricula-_judae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376358/normal_5fbd97e54d833.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/baritexovopa/wotujowo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e44c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE44C 5156 bytes
SHA-256: ecc17d8b568fe1833a1cff1168539cc4c936c60eeea6d5ecaba308ae41b381e2
font_01_sfnt_off0000f5eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5EB 10220 bytes
SHA-256: 437288f6485b6e31e8776d2c45283f499555b4516082c535bd3273267cf031d1
font_02_sfnt_off000118f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118F8 16088 bytes
SHA-256: 23fa5fdee83b516af200f6ca26aee9b7b3e264eabd0e435be089f4664db1fd95

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