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)
MD5: 4ba525234000dbe65674314056ed70f1 SHA-1: 185ac92b01f9d082d9d0a12984535b87f04137da SHA-256: a880868d678d0ace06e9109cfa3af38ab7cf9ead1fabd48346c4a0d6ca6a68cf
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a large number of external links pointing to various domains, many of which appear to be disposable hosting services. This behavior is indicative of a link farm, often used for SEO manipulation or to distribute malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://crophysi.ru/aws?utm_term=google+sheets+scatter+plot+connect+points
    • https://dowibowaxetejoz.weebly.com/uploads/1/3/0/7/130740522/larepafipitupiri.pdf
    • https://muxajugukeso.weebly.com/uploads/1/3/1/4/131453177/bidexanizalikeji.pdf
    • https://xajakubadom.weebly.com/uploads/1/3/0/8/130874473/zamuwudulujaluvosada.pdf
    • http://bilet-pdd.site/75599099334yg9xh.pdf
    • http://gijutudubesakuz.iblogger.org/lojexeguwoga.pdf
    • https://cdn.sqhk.co/pawosuku/hjhhtic/geometry_dash_lite_beating_all_levels.pdf
    • http://arfesopt.com/802279694025ol37.pdf
    • https://wijodemarivupi.weebly.com/uploads/1/3/4/8/134861972/jojokov_ragos_vemali.pdf
    • https://kupepepa.weebly.com/uploads/1/3/0/8/130874668/pafogu_xipiradud.pdf
    • http://umkatrade.ru/honda_cb400a_service_manualoei53.pdf
    • https://pebezudaxefen.weebly.com/uploads/1/3/4/3/134347708/182473.pdf
    • https://xadidevoki.weebly.com/uploads/1/3/0/8/130873902/zibod-vaserabexelof-towariteli-regapo.pdf
    • https://tivenudonokokom.weebly.com/uploads/1/3/0/9/130969369/guwuxuwirotidenekag.pdf
    • https://sugelazo.weebly.com/uploads/1/3/4/7/134767002/4573774.pdf
    • http://sarhello.online/laminas_del_test_de_raven_para_desca1ip8g.pdf
    • http://vvd.bar/shooter_walter_dean_myerslspfn.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://miduzusajaveg.rf.gd/workplace_incident_report_form_sa.pdf
    • http://pavasokunise.epizy.com/fajatomo.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

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

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