Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ddcdd29ba816fee…

MALICIOUS

PDF

90.8 KB Created: 2021-06-08 23:34:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: f2ddd1bc20e4a4519ff5fb008e99ac36 SHA-1: af540acc3b2fe3dd9d87e4e43745cb905f599514 SHA-256: 0ddcdd29ba816feef17f53654f9dc6ca9cb5e29dc06d1dff2036eb8f64f7bf23
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO spamming operation. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external URLs point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://philabc.ru/pbw?utm_term=interrogative+pronouns+worksheet+pdf PDF link annotation
    • https://movakesomerinid.weebly.com/uploads/1/3/4/5/134528648/462833744.pdfIn PDF document text
    • https://lowixuwegula.weebly.com/uploads/1/3/0/7/130775587/28d44bf.pdfIn PDF document text
    • https://pazibeze.weebly.com/uploads/1/3/1/6/131636707/8d7d883b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413578/normal_6049bc63817e5.pdfIn PDF document text
    • https://lukimozogu.weebly.com/uploads/1/3/4/6/134638062/faf6a19eab82d74.pdfIn PDF document text
    • https://gudivolopuna.weebly.com/uploads/1/3/5/3/135346868/pitesidajosuvogu.pdfIn PDF document text
    • https://supagerafigi.weebly.com/uploads/1/3/0/8/130874211/jetogiluwukaja.pdfIn PDF document text
    • https://pogugabumivo.weebly.com/uploads/1/3/1/3/131381840/jidaguwoloro_fafewamapux.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365656/normal_6063e262253fa.pdfIn PDF document text
    • https://gisidamuxifa.weebly.com/uploads/1/3/0/7/130775495/norujezaragekewofav.pdfIn PDF document text
    • https://mizemajawoxulu.weebly.com/uploads/1/3/1/4/131437858/7865179.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4466659/normal_60b72dd65db24.pdfIn PDF document text
    • https://xunowarusaki.weebly.com/uploads/1/3/4/3/134371630/resojidere.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468843/normal_6056f446298d7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480155/normal_5fef99cf36b30.pdfIn PDF document text
    • https://tejojapifofomo.weebly.com/uploads/1/3/4/3/134339563/botijoporaxoj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://midevodimu.pbworks.com/f/baloliwivari.pdfIn PDF document text
    • http://zorisomofi.pbworks.com/w/file/fetch/144853380/bancomer_swift_code_zacatecas.pdfIn PDF document text
    • http://fevuxowina.pbworks.com/f/zazoxirazogawuwo.pdfIn PDF document text
    • http://vikowezanipe.pbworks.com/f/whats_the_strongest_weapon_in_dark_souls.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_off00010039.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10039 5424 bytes
SHA-256: ac149f4f8748bba93a20251130ae2460684cc673d0158e53d7cacb4854c3a9bc
font_01_sfnt_off000112c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112C5 18200 bytes
SHA-256: dfd5da2d0f7e043b5c9d3adb66cb5e283848a6f8ea25b08857d7631022a61d16
font_02_sfnt_off00014846.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14846 16204 bytes
SHA-256: c988415812f594187b0a0ed75dc52802e798e1695b49bd300f8412a65040a449