Malicious PDF — malware analysis report

Static analysis result for SHA-256 867a395ffa6c8eaa…

MALICIOUS

PDF

68.6 KB Created: 2021-03-15 23:51:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: e761b1458f3018b742d895abe1df0fd7 SHA-1: ec92e438093e3bf1be4c27fe313202b61f564380 SHA-256: 867a395ffa6c8eaacf68e657549da3ec6651d6b49c7485dfa0e2aad09bce0f0a
126 Risk Score

Malware Insights

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

The PDF contains multiple external URIs pointing to disposable hosting, indicating a link farm likely used for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document, likely delivered via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://midufefew.ru/wix?keyword=islamic+empire+crossword+puzzle+answers PDF link annotation
    • http://guzoseta.getenjoyment.net/craftsman_10_laser_trac_radial_arm_saw_manual.pdfIn PDF document text
    • http://epipog.com/56358631525jh7jg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495846/normal_600214bac9db6.pdfIn PDF document text
    • https://kajubuti.weebly.com/uploads/1/3/2/6/132680994/xefowabelewoser-wiferez-kinuletemarubax-kulokut.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473445/normal_5fec675d6b20a.pdfIn PDF document text
    • http://familyit.pro/nimaxolhww7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490720/normal_5fe1d07fc4fca.pdfIn PDF document text
    • https://titumakusijuvap.weebly.com/uploads/1/3/4/3/134353199/cc9a1f9972850e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445550/normal_600be2e44f4dd.pdfIn PDF document text
    • https://zunarorukozem.weebly.com/uploads/1/3/4/0/134016655/7122848.pdfIn PDF document text
    • http://triple-doska1.club/da_doo_ron_ron_lyrics_and_chordsygwuy.pdfIn PDF document text
    • https://xoxomedeze.weebly.com/uploads/1/3/5/3/135308121/kaxanadawivifo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382952/normal_600dd90e204e9.pdfIn PDF document text
    • http://kavelizopepi.mywebcommunity.org/pikivuvena.pdfIn PDF document text
    • http://diluzadumavotux.getenjoyment.net/unshakeable_tony_robbins_summary.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/31394389-3633-4d6f-91c4-8796bca924d9/tonole.pdfIn PDF document text
    • https://0cfe495c-9a5f-46a1-a5f3-fb21b6211bac.filesusr.com/ugd/7aabb2_405620348bba4a2aa5d9e1f768e318a2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4744e4c4-25fe-4c7c-aa2b-71a70f28e083/28761145539.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c722355-faf9-4cbf-a9ed-adb0ad68ddd8/jedigijug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f0a1aa3-847e-4729-866b-c5f8ebf58a5a/how_to_fix_kenmore_ice_maker_not_making_ice.pdfIn PDF document text
    • https://0a9d52b7-bae8-445b-b6d2-8eba0f02533c.filesusr.com/ugd/729231_fbb3bece42ea4b68ad689f5a6f0a628c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbf90aa5-d8c0-4f4a-8fe7-057a5a58f543/dometic_ac_control_board_replacement.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_off0000d01e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD01E 5300 bytes
SHA-256: d1ea3d781837c8049288370eadc10f402808159e10341ba0cb9f42c1bd04dc74
font_01_sfnt_off0000e221.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE221 10188 bytes
SHA-256: 88291fa3a611051d318bdc63536829457b203598d04944fdcc0c1357e188133a