Malicious PDF — malware analysis report

Static analysis result for SHA-256 a880868d678d0ace…

MALICIOUS

PDF

87.7 KB Created: 2021-02-02 09:03:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 4ba525234000dbe65674314056ed70f1 SHA-1: 185ac92b01f9d082d9d0a12984535b87f04137da SHA-256: a880868d678d0ace06e9109cfa3af38ab7cf9ead1fabd48346c4a0d6ca6a68cf
244 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics as malicious, including a critical finding for linking to known malicious redirector infrastructure. The document contains a large farm of 30 external links, many hosted on disposable domains, suggesting an attempt to distribute malware or conduct phishing. The ML classifier and ClamAV detection further support its malicious nature. While no scripts were explicitly extracted, the embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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.
  • 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://crophysi.ru/aws?utm_term=google+sheets+scatter+plot+connect+points In PDF document text
    • https://dowibowaxetejoz.weebly.com/uploads/1/3/0/7/130740522/larepafipitupiri.pdfIn PDF document text
    • https://muxajugukeso.weebly.com/uploads/1/3/1/4/131453177/bidexanizalikeji.pdfIn PDF document text
    • https://xajakubadom.weebly.com/uploads/1/3/0/8/130874473/zamuwudulujaluvosada.pdfIn PDF document text
    • http://bilet-pdd.site/75599099334yg9xh.pdfIn PDF document text
    • http://gijutudubesakuz.iblogger.org/lojexeguwoga.pdfIn PDF document text
    • https://cdn.sqhk.co/pawosuku/hjhhtic/geometry_dash_lite_beating_all_levels.pdfIn PDF document text
    • http://arfesopt.com/802279694025ol37.pdfIn PDF document text
    • https://wijodemarivupi.weebly.com/uploads/1/3/4/8/134861972/jojokov_ragos_vemali.pdfIn PDF document text
    • https://kupepepa.weebly.com/uploads/1/3/0/8/130874668/pafogu_xipiradud.pdfIn PDF document text
    • http://umkatrade.ru/honda_cb400a_service_manualoei53.pdfIn PDF document text
    • https://pebezudaxefen.weebly.com/uploads/1/3/4/3/134347708/182473.pdfIn PDF document text
    • https://xadidevoki.weebly.com/uploads/1/3/0/8/130873902/zibod-vaserabexelof-towariteli-regapo.pdfIn PDF document text
    • https://tivenudonokokom.weebly.com/uploads/1/3/0/9/130969369/guwuxuwirotidenekag.pdfIn PDF document text
    • https://sugelazo.weebly.com/uploads/1/3/4/7/134767002/4573774.pdfIn PDF document text
    • http://sarhello.online/laminas_del_test_de_raven_para_desca1ip8g.pdfIn PDF document text
    • http://vvd.bar/shooter_walter_dean_myerslspfn.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://miduzusajaveg.rf.gd/workplace_incident_report_form_sa.pdfIn PDF document text
    • http://pavasokunise.epizy.com/fajatomo.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e44f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE44F 5228 bytes
SHA-256: bd686798404b8516420c02bc642c4fbb1ab284dbafcddaad6f77b5b2abf99bc7
font_01_sfnt_off0000f611.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF611 2092 bytes
SHA-256: 78e94e2e47178245ca437e301e19f50dc99845ecc02da2ba30fe2b1e34051cc2
font_02_sfnt_off0000ffb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFB6 11520 bytes
SHA-256: f0594f22e0234f22c88bc9078f3465ba12a88e306000f3738e34550ea361aa35
font_03_sfnt_off0001276e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1276E 23164 bytes
SHA-256: 1ff867dd429b41c4660bf93c87f62fefe4fc1dbad1b893da4f33196e0c43f796