Malicious PDF — malware analysis report

Static analysis result for SHA-256 a36ab885dec583b8…

MALICIOUS

PDF

70.3 KB Created: 2021-02-20 04:13:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: ab208100585609bbb7c47685ba5712e6 SHA-1: 0037ce3a3657eac69fa8cc1aaf8f3c7f56816eb6 SHA-256: a36ab885dec583b84d5dc13dc474f40f12285c371840aa814f4989e6075c8261
196 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://druttle.ru/wix?keyword=a+civil+action+worksheet+answers PDF link annotation
    • https://xatevixi.weebly.com/uploads/1/3/4/6/134651360/salegevevit-kaxiwojaba-galub-zirawuzen.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416792/normal_5fdc03530a5a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365642/normal_600fe45560ce7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416805/normal_6010b2fa57284.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366063/normal_601dc9cd144ea.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457573/normal_5ffcd77303d9c.pdfIn PDF document text
    • http://fosukimiten.22web.org/nurujititelevegono.pdfIn PDF document text
    • http://duperalenow.22web.org/canon_ds126_151_specs.pdfIn PDF document text
    • http://kovajexikimodu.iblogger.org/nizaleguzuvodexipafu.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/lukepepe/f1_visa_interview_experience_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/tokit/52964272883.pdfIn PDF document text
    • http://xikimafelote.epizy.com/train_departure_board_template.pdfIn PDF document text
    • https://s3.amazonaws.com/donarepemi/30922407667.pdfIn PDF document text
    • https://s3.amazonaws.com/rujimidujek/70742785375.pdfIn PDF document text
    • https://s3.amazonaws.com/pajeriramal/lagu_teri_meri_ankahi_dastan.pdfIn PDF document text
    • http://vowafipefazasex.epizy.com/chemistry_of_fireworks_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/xumakomowi/wirixemozizukobolenavadu.pdfIn PDF document text
    • https://s3.amazonaws.com/wezukep/47625904584.pdfIn PDF document text
    • http://loviwinirapam.rf.gd/2019_monthly_calendar_templates_word.pdfIn PDF document text
    • http://sawutekoxa.epizy.com/how_to_adjust_liftmaster_p3.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_off0000d7ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7CA 5092 bytes
SHA-256: 97a622cf24a5ebb3eb9251bfd5e907d451fa6bdec963b28b1a641ed30a042be9
font_01_sfnt_off0000e92b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE92B 10256 bytes
SHA-256: 0b811cbcc3262e94de4483c2d4b340e77a51bfb6e54943a48add3da09252534c

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