Malicious PDF — malware analysis report

Static analysis result for SHA-256 664e7ce104094707…

MALICIOUS

PDF

78.0 KB Created: 2021-03-24 18:31:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: e411dfe830af2405a6f5f592196b299e SHA-1: 70518a0c19150afa8ef29a2efa0557dc0b21cfb7 SHA-256: 664e7ce1040947070131fcf222454c909fd3d7698048186c33383e9d4cba7443
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://gimoguvi.ru/123?utm_term=difference+between+diagnostic+formative+and+summative+assessments PDF link annotation
    • https://cdn.sqhk.co/jepogedofuz/bcDuhie/calculator_soup_fractions.pdfIn PDF document text
    • http://jadogaxarabu.mygamesonline.org/presto_pressure_canning_instructions.pdfIn PDF document text
    • http://fizebiredasibi.mypressonline.com/what_is_a_good_debate_topics_for_college_students.pdfIn PDF document text
    • https://cdn.sqhk.co/niwonosorude/cgdnUta/moduledatotax.pdfIn PDF document text
    • https://cdn.sqhk.co/wakewafo/dibjfhh/dozejuxipu.pdfIn PDF document text
    • http://rigudozefogo.mypressonline.com/advanced_english_stories.pdfIn PDF document text
    • https://cdn.sqhk.co/zexupibo/IhdtKlK/84860552774.pdfIn PDF document text
    • https://cdn.sqhk.co/dobulefipuji/Cftpjhj/39239853424.pdfIn PDF document text
    • https://cdn.sqhk.co/besogevipadi/ijgdLXo/77574645670.pdfIn PDF document text
    • https://cdn.sqhk.co/sepokafaru/bb6iaY6/97987791774.pdfIn PDF document text
    • https://cdn.sqhk.co/femelofep/gghhihg/3d_planet_wallpaper.pdfIn PDF document text
    • https://cdn.sqhk.co/tajavujexiz/4ijvdjj/1690860237.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pulutugorivexek.atwebpages.com/letter_from_a_birmingham_jail_analysis.pdfIn PDF document text
    • https://s3.amazonaws.com/gujutavevive/52737370092.pdfIn PDF document text
    • https://s3.amazonaws.com/novipaliwid/algebra_factorising_worksheet_ks3.pdfIn PDF document text
    • https://6525eaf8-9a42-4119-9fb4-c3d475b3b78e.filesusr.com/ugd/80bfa9_49ea93b616444c218d7749c1cc0c791c.pdf?index=trueIn PDF document text
    • https://2791e1c6-719d-47aa-bdc5-1556df251b63.filesusr.com/ugd/7757c5_844bd092808e408c8e6e880e71ee7d15.pdf?index=trueIn PDF document text
    • http://peledopa.myartsonline.com/the_great_hunt_grand_tour_island.pdfIn PDF document text
    • http://vumamuv.myartsonline.com/dikukurosipevulivo.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efe9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE9 5600 bytes
SHA-256: 7ff3da0224deb642493fe29bff584f5e92a2de9a7fdbe5026d0453b73088d625
font_01_sfnt_off000102fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102FC 10804 bytes
SHA-256: 3d5ff217a674a2dee63acf4222615e2e4da7e7f7f92f26c10027b8c3bb99fb22

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