Malicious PDF — malware analysis report

Static analysis result for SHA-256 d145fa1cbec607d4…

MALICIOUS

PDF

55.4 KB Created: 2021-03-06 09:07:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: b1244a46ba2337297a2517efaa92608b SHA-1: 4358643312705ae1070e16b96baddc0d1ba95f51 SHA-256: d145fa1cbec607d482e6e847dd75bf62c884051ce47ddd40ad75476ba4119d9a
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to disposable hosting, and is flagged by ML classifiers and ClamAV as malicious. The primary malicious URL, 'https://jumiwimov.ru/award?keyword=coleman+electric+furnace+blower+not+working', suggests a phishing or scam attempt disguised as a search result. No scripts were extracted, but the PDF structure and URL distribution indicate a link farm designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6222

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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://jumiwimov.ru/award?keyword=coleman+electric+furnace+blower+not+working PDF link annotation
    • http://tefuvawilutir.mypressonline.com/how_much_is_a_wendys_6_piece_nugget.pdfIn PDF document text
    • http://bapatavusirave.mygamesonline.org/alexander_the_great_empire_map.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475212/normal_5fc5fa680fa90.pdfIn PDF document text
    • http://gelufose.scienceontheweb.net/set_time_timex_1440_sports_digital_watch.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368235/normal_5fc677c99afe6.pdfIn PDF document text
    • http://moscowflowers.shop/jiwadigagefureninagovemiebvj2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419650/normal_5fdfd18cc764a.pdfIn PDF document text
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    • http://byseles.xyz/31370969444bn3n0.pdfIn PDF document text
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    • http://gemofesane.medianewsonline.com/24176195365.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495241/normal_60128cdeeff3b.pdfIn PDF document text
    • http://vonexalux.sportsontheweb.net/zuzeluxitimakawole.pdfIn PDF document text
    • http://kaxuwenewutexu.myartsonline.com/juwamavit.pdfIn PDF document text
    • https://s3.amazonaws.com/vifusupegiza/bamokufofaneve.pdfIn PDF document text
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    • http://jokosen.atwebpages.com/clayden_warren_organic_chemistry.pdfIn PDF document text
    • https://s3.amazonaws.com/mipeboro/tisogabenabazunewep.pdfIn PDF document text
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