Malicious PDF — malware analysis report

Static analysis result for SHA-256 e580adc953403bbe…

MALICIOUS

PDF

74.3 KB Created: 2021-02-13 17:57:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 2b0a20a3e6ced1bb0e90bf52e5fe7225 SHA-1: e913c79f836185cc52a6febb97a9218df1403614 SHA-256: e580adc953403bbe725fcb992eff246840cf3a67d5d49a806092bd964910656b
192 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains embedded links, including one pointing to a known malicious redirector infrastructure at 'https://crophysi.ru/123?utm_term=watch+interview+with+a+vampire+netflix'. The document body, though heavily obfuscated, suggests a lure related to a 'vampire' interview, likely to entice users to click the malicious link. The presence of multiple links on disposable hosting further supports a phishing or redirection scheme.

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
  • 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 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://crophysi.ru/123?utm_term=watch+interview+with+a+vampire+netflix In PDF document text
    • http://kelirajisob.66ghz.com/zojareramejilaziwur.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478133/normal_5fcd527e93719.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417030/normal_5fe2cbcd100c3.pdfIn PDF document text
    • https://cdn.sqhk.co/noperizapewo/dztI0hd/datojonotokidefe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421960/normal_5fcc6c8e9368d.pdfIn PDF document text
    • https://cdn.sqhk.co/dutimapo/ihFk265/car_parking_multiplayer_mod_apk_unlocked_everything.pdfIn PDF document text
    • http://shoop-fo.ru/rules_for_adding_and_subtracting_fractions_with_unlike_denominatorsop5js.pdfIn PDF document text
    • http://shtangennstutkupitseychas.xyz/vezunapuwulufinekijodiluq6c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486033/normal_6001c783d8884.pdfIn PDF document text
    • https://cdn.sqhk.co/pofifarim/qieaJBz/motorcycle_racing_gear_indicator.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dagewokoxigu.rf.gd/new_bollywood_video_songs_2017.pdfIn PDF document text
    • http://tiriburud.rf.gd/tifafimagewofefojelexu.pdfIn PDF document text
    • http://pilulozames.epizy.com/health_information_analyst_jobs_toronto.pdfIn PDF document text
    • http://mojorudo.epizy.com/avengers_theme_song_meme.pdfIn PDF document text
    • http://letozin.rf.gd/78574088306.pdfIn PDF document text
    • http://kanisal.epizy.com/best_beginners_guide_to_stock_market.pdfIn PDF document text
    • http://tubiruk.epizy.com/77366583181.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_off0000e594.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE594 5308 bytes
SHA-256: c453558c6a3e1ce37d8835ee27c487a44e9c1aa13b89801ebfe86500a657b4fd
font_01_sfnt_off0000f799.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF799 10800 bytes
SHA-256: eb7e7fbb93aede6b7c45b5f3d96e7f5e963648bda8a9a185869c3fb774e783a7

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