Malicious PDF — malware analysis report

Static analysis result for SHA-256 74874612c698ad55…

MALICIOUS

PDF

82.2 KB Created: 2021-03-17 00:59:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: e8b2a8bc7c60656725281c24afbe1774 SHA-1: db2ed7d7fdd93cb56fdbbd0fa1710bdd2131ed16 SHA-256: 74874612c698ad550cc1b296e5b3f902e3368d0384655594ab62074b3192dc36
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable domains, suggesting a link farm designed to host malicious content or redirect users to phishing sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document, potentially leveraging embedded JavaScript for malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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.
  • 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://xajibur.ru/wix?keyword=clear+dash+hd+manual+espa%25C3%25B1ol PDF link annotation
    • https://vuderuxedus.weebly.com/uploads/1/3/4/6/134692959/dc4509cd4140.pdfIn PDF document text
    • http://meriline.store/hairy_fred_song_lyrics2wi47.pdfIn PDF document text
    • http://shopbest.online/how_much_does_a_cvt_transmission_service_cost1ub6z.pdfIn PDF document text
    • http://cetakchantek.com/xutudusevatakuny5zde.pdfIn PDF document text
    • https://jutamuxenaritul.weebly.com/uploads/1/3/1/4/131452982/568343.pdfIn PDF document text
    • http://trend-sales.fun/nemaxanudujugesil47j99.pdfIn PDF document text
    • https://tafevivif.weebly.com/uploads/1/3/2/6/132682704/8974163.pdfIn PDF document text
    • http://obmenkalnr.online/2315652463c059y.pdfIn PDF document text
    • https://sojopukav.weebly.com/uploads/1/3/4/2/134266177/daginat_runoron.pdfIn PDF document text
    • http://dvigatel.guru/storm_kings_thunder_google_driveyxdm5.pdfIn PDF document text
    • http://podarokinsta365.site/kezojodeg4qcik.pdfIn PDF document text
    • http://paktum.pro/ielts_practice_test_2019_with_answers06juw.pdfIn PDF document text
    • https://kawavaturitavo.weebly.com/uploads/1/3/5/3/135321378/abdefd56467f7ff.pdfIn PDF document text
    • http://wopedejani.iblogger.org/eanm_guidelines_lung_scintigraphy.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b874e6ca-d13f-4269-9054-9330cb2ce57d/modokikej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/819ecfdb-cdbb-42b0-bdb4-485b4cf22722/strongs_exhaustive_concordance.pdfIn PDF document text
    • http://tivusanezidiv.rf.gd/zanut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9f4c6bb-62f3-4ceb-b674-234f1859a28c/4832370587.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c47b9af-4a41-4e26-bb60-682b214c5c9c/logitech_z623_review_audiophile.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bda47ff5-d4d3-4ca2-a756-7809577bd4d0/soluciones_molares_formula.pdfIn PDF document text
    • http://kirawolus.rf.gd/loxenoku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/053206cd-862a-4591-94a4-efe81a14782e/american_politics_today_essentials_5th_edition_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25e5ec85-a5b1-4ac6-8099-87e91d4aea00/cub_cadet_lt1042_parts_diagram.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/011bad74-082a-4654-af53-321776d8d927/how_to_learn_hangul_easily.pdfIn PDF document text
    • http://nepopujadulipid.epizy.com/convertible_note_template_singapore.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_off0000fb86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB86 5316 bytes
SHA-256: 2718b2e98f433e44222d96e2d66171b686a85c33cd4c96a25c3d9f8bfff7fdc4
font_01_sfnt_off00010d24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D24 13776 bytes
SHA-256: 1d7a457869accb11ae63970dcc88e7afb628a5ef46ebf1624158b45fc68a6e30