Malicious PDF — malware analysis report

Static analysis result for SHA-256 0820ad4e10936b5c…

MALICIOUS

PDF

72.7 KB Created: 2021-02-27 02:20:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 58a82ffa9f8a127666dc9026b7eb1324 SHA-1: e039cfcedc9969fdc9b64db7f4fb772310c768fe SHA-256: 0820ad4e10936b5cae57e4f2f97fa892a713b01f68e64949f5ac3758a14657fd
186 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which are hosted on disposable domains, indicating a link farm designed to redirect users. The presence of a URL with a 'utm_term' parameter suggests a phishing or SEO manipulation tactic. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/strik?utm_term=what+does+5+beeps+mean+on+a+dell+laptop PDF link annotation
    • https://bemisawu.weebly.com/uploads/1/3/4/7/134716701/8393732.pdfIn PDF document text
    • http://plafond.xyz/how_to_program_honeywell_outdoor_light_timerncuk5.pdfIn PDF document text
    • https://xikunozazoteta.weebly.com/uploads/1/3/1/4/131453294/molobanefupufiwemeg.pdfIn PDF document text
    • https://poxanada.weebly.com/uploads/1/3/1/4/131483305/bositibumevebin_papojewejur_nazap_wiwupezigepona.pdfIn PDF document text
    • http://golden-charm.ru/33214867194qgc1t.pdfIn PDF document text
    • http://dresdenpharma.ru/ravepuxufusobikinapifurn2ot.pdfIn PDF document text
    • https://pezazexumazu.weebly.com/uploads/1/3/5/3/135392870/gisudotilele_sotam_lilujumanov_rakibipezu.pdfIn PDF document text
    • https://larezonisu.weebly.com/uploads/1/3/0/7/130738889/karitiwirovubegegex.pdfIn PDF document text
    • https://timurikamaz.weebly.com/uploads/1/3/1/4/131406182/75026ea763.pdfIn PDF document text
    • https://gemumumesuligiv.weebly.com/uploads/1/3/4/3/134318519/4e93fa.pdfIn PDF document text
    • https://zasevolonuto.weebly.com/uploads/1/3/5/3/135335071/rafedepid_jawofezuvib.pdfIn PDF document text
    • https://kiwotatuna.weebly.com/uploads/1/3/1/8/131856308/wupaxato_sevin_wenarapo.pdfIn PDF document text
    • https://siwevamad.weebly.com/uploads/1/3/1/8/131871433/sixedotasumu-nagizevumeb.pdfIn PDF document text
    • https://zorivaleguzovul.weebly.com/uploads/1/3/4/5/134596353/jalaf-sazamumike-wimewikufurunov.pdfIn PDF document text
    • https://pufodafu.weebly.com/uploads/1/3/5/9/135959320/zoradobosalaxo-bopoxeruxijaj.pdfIn PDF document text
    • http://optalpha.com/titujokajufevbxo07.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/gateme/gisoz.pdfIn PDF document text
    • https://s3.amazonaws.com/vesubodufisi/64289061076.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_off0000df46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF46 5380 bytes
SHA-256: bfe4808c6b51bb0e8dc3bce5e96b32e520d65b200890659ef4240038ce75d3ea
font_01_sfnt_off0000f177.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF177 10704 bytes
SHA-256: ad214ea061026089f466a7d348f59d5ef582aeb8d3227dada090a414be33e345

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