Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d94952d32bdbc69…

MALICIOUS

PDF

73.5 KB Created: 2021-02-11 02:45:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: b1639d62c15bcffad452dae4285bd6e1 SHA-1: 0cd499b9d7e351ba1c6b61f19b5a6ae5dbf8d4d6 SHA-256: 8d94952d32bdbc6987d2c30d48a146e0bfc87f9a62f443994b8fb51e7b0044ab
274 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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://yafferge.ru/123?utm_term=tv+show+proposal+template+doc In PDF document text
    • https://cdn.sqhk.co/musutalivun/L2ib4hd/usa_national_parks_scratch_off_map.pdfIn PDF document text
    • https://nopetozu.weebly.com/uploads/1/3/4/5/134507327/woguvatefan-tiwowane.pdfIn PDF document text
    • https://cdn.sqhk.co/kixowijeka/89Zovwy/sibuzigularexiza.pdfIn PDF document text
    • https://vawilateg.weebly.com/uploads/1/3/4/6/134697686/3a218e4a0.pdfIn PDF document text
    • http://sujatafuluwariv.22web.org/95424902569.pdfIn PDF document text
    • http://gutekixawa.22web.org/beto_o_rourke_platform.pdfIn PDF document text
    • http://zawotagulokexa.iblogger.org/django_form_charfield_read_only.pdfIn PDF document text
    • https://cdn.sqhk.co/terasovo/RM22gjj/triominos_deluxe_board_games.pdfIn PDF document text
    • https://warogowi.weebly.com/uploads/1/3/1/6/131606132/20f377.pdfIn PDF document text
    • https://cdn.sqhk.co/movozuba/dAhhXrI/42590074833.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/genedesowul/54702007321.pdfIn PDF document text
    • https://s3.amazonaws.com/kiwopusafize/69897031447.pdfIn PDF document text
    • http://pajamubo.rf.gd/human_fall_flat_xbox_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/vojapu/spider_man_game_free_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/meludav/wesexagev.pdfIn PDF document text
    • https://s3.amazonaws.com/toniseligiwuzux/triangle_congruence_worksheet_2.pdfIn PDF document text
    • https://s3.amazonaws.com/xenavuxa/nepanepaxavekekorulod.pdfIn PDF document text
    • https://s3.amazonaws.com/sitozi/latest_biodata_format_for_marriage.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_off0000dd89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD89 5412 bytes
SHA-256: b8226868a7d286dfdcf919c069de048115a2918c006907e0f738398a21631d87
font_01_sfnt_off0000efdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFDB 11632 bytes
SHA-256: 315baa4155307bcc46bfc294c38d370cd2e46a53d63b9f5159e080b10f12d1f7