Malicious PDF — malware analysis report

Static analysis result for SHA-256 63c6686b4e35b138…

MALICIOUS

PDF

64.6 KB Created: 2021-02-21 11:08:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: c46b3abbc6c4ab962fdda6d94a1c5a7a SHA-1: cf07b1bf5c5aad55101fa468e0a5b16d86b34aa6 SHA-256: 63c6686b4e35b1385bf8d91fd804656f2c60ddb1f22690597fafa3e6eea048f5
186 Risk Score

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://baarspo.ru/wix?keyword=parent+function+matching+worksheet+answers PDF link annotation
    • https://cdn.sqhk.co/jigekuragige/gdhdOhb/world_of_wizards.pdfIn PDF document text
    • https://cdn.sqhk.co/kuzetuzame/AYNN4ij/64867786518.pdfIn PDF document text
    • https://dexanefuv.weebly.com/uploads/1/3/1/3/131383512/liramatax-xaxegelo-roxirobotumobi-gigexu.pdfIn PDF document text
    • https://cdn.sqhk.co/taxosavasesa/jgAgjgg/71800438728.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450353/normal_5fed35f8d17d5.pdfIn PDF document text
    • https://vibisorimujeke.weebly.com/uploads/1/3/4/3/134344086/xufapolu.pdfIn PDF document text
    • https://cdn.sqhk.co/gowexenopa/5ieFdhE/51455958578.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476596/normal_5fd95b2edb000.pdfIn PDF document text
    • https://cdn.sqhk.co/xolofiwano/nowiaji/real_gold_football_helmets_notre_dame.pdfIn PDF document text
    • https://silujufadusume.weebly.com/uploads/1/3/1/1/131164496/831bf5636cf2c.pdfIn PDF document text
    • http://pumba-timon.space/economic_census_survey_exam_questions_and_answersczthq.pdfIn PDF document text
    • https://cdn.sqhk.co/dezorevukor/icgNjbK/spinal_tap_quotes.pdfIn PDF document text
    • https://tofavasexivefet.weebly.com/uploads/1/3/4/5/134578877/tebeg.pdfIn PDF document text
    • https://pepulumowuso.weebly.com/uploads/1/3/2/6/132681954/jasaxudokenexub-zuvosabor-nogomorugefes-juselopubazu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501208/normal_5fdbca83816d7.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/gonima/bepinevugep.pdfIn PDF document text
    • https://s3.amazonaws.com/zalisujezajaje/adventure_journey_pokemon_ios.pdfIn PDF document text
    • https://s3.amazonaws.com/numegubowalonan/80027487664.pdfIn PDF document text
    • https://s3.amazonaws.com/bisapovepizaj/revenue_canada_business_income_tax_forms.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_off0000c033.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC033 5420 bytes
SHA-256: a023ad826db1be94cbb242dce4c52b5f42e72a9a53cda34a7d6915ecd997679c
font_01_sfnt_off0000d292.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD292 9716 bytes
SHA-256: 2092edf2d748acfde9a68750ccc671d5a25f9e4a259d77c1c79843e858497891