Malicious PDF — malware analysis report

Static analysis result for SHA-256 29fd8b663d564b35…

MALICIOUS

PDF

73.6 KB Created: 2021-02-28 00:12:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: cf87524680dba23b282d3a67960189ba SHA-1: 8184dd5b018948d4215d2a81237a4f29a5c4f2ff SHA-256: 29fd8b663d564b35bb5e43a9e3e204794aaac93f8c1ebf01932312ffaaa119b4
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a link farm disguised as information about 'rare genetic disorders support groups'. This content, combined with the PDF_SEO_DISPOSABLE_LINK_FARM heuristic and numerous external URLs pointing to potentially malicious or disposable domains, indicates a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lead the user to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

Heuristics 5

  • 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 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://jottigo.ru/award?keyword=rare+genetic+disorders+support+groups PDF link annotation
    • http://suvuxivenorum.mypressonline.com/vixotuzajenesasewabadilo.pdfIn PDF document text
    • http://xsale.trade/46530170619rr8kf.pdfIn PDF document text
    • http://fazejajogavu.medianewsonline.com/haier_portable_air_conditioner_replacement_hose.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373016/normal_5fd879c2d7f6a.pdfIn PDF document text
    • http://rakakap.iblogger.org/how_to_use_scapy_in_ubuntu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411489/normal_5fcf5b8964559.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417664/normal_5fd673b58ea0f.pdfIn PDF document text
    • http://copyrightsupport-ig.com/cricket_rules_bowling_no_ballsdissn.pdfIn PDF document text
    • http://islta.fun/chromedriver_for_selenium_coc7qs.pdfIn PDF document text
    • http://italywow.info/agneepath_full_movie_480p_mkvrcn57.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://muwiliwus.epizy.com/tawadojivilodarekix.pdfIn PDF document text
    • http://xixujoteb.epizy.com/bebetawobonibojakubuna.pdfIn PDF document text
    • http://jajujej.rf.gd/how_to_dpf_regen.pdfIn PDF document text
    • http://sivikonalijuto.myartsonline.com/onkyo_tx-sr313_5.1_av-receiver_test.pdfIn PDF document text
    • http://fotiworoz.epizy.com/2763512261.pdfIn PDF document text
    • http://weweladegop.rf.gd/noxek.pdfIn PDF document text
    • http://gafodix.myartsonline.com/farmer_boy_book_summary.pdfIn PDF document text
    • http://remibuvemofe.epizy.com/vampire_diaries_cast_season_7_lily.pdfIn 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_off0000eabb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEABB 5216 bytes
SHA-256: 273e809cb1c6124f5fe4b6127eea0be7cc11c8f9bc3cc85ac5c8f5d55fc0cf2d
font_01_sfnt_off0000fc92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC92 10716 bytes
SHA-256: 9536a0e526d04d0df07bdf69d7a011b03ab9a2bcedac641bd3f991c0ee3236ca

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