Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cbe98795fa175c4…

MALICIOUS

PDF

92.8 KB Created: 2021-03-16 04:58:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 2d37ee12e71d7c57e33acfce4d1b4d41 SHA-1: 6838de667c2004313e59ef8e314e6512578a92f8 SHA-256: 2cbe98795fa175c48aa078bedf6e717913b1231db192406bd20ed200f3cca46e
126 Risk Score

Malware Insights

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

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to disposable domains or link farms, suggesting a phishing or malware distribution campaign. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags the document as a link farm on disposable hosting, reinforcing the malicious purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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
  • 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://bologen.ru/aws?utm_term=gilded+reverie+lenormand+card+meanings+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4497081/normal_5fd651d422a2d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495040/normal_5fd6d176df0d1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411935/normal_5fe28ab8e4a48.pdfIn PDF document text
    • http://sijubuwejipamun.mywebcommunity.org/united_limo_south_bend_to_ohare_schedule.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459481/normal_5feb01cccb4af.pdfIn PDF document text
    • http://bafiselavanebep.mywebcommunity.org/ganesh_atharvashirsha_mantra.pdfIn PDF document text
    • http://sekelenogake.getenjoyment.net/90965218756.pdfIn PDF document text
    • http://fukerijinexin.mygamesonline.org/binghamton_university_campus_map.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501360/normal_604a54ef539c6.pdfIn PDF document text
    • http://nifimoperokoj.medianewsonline.com/cemetery_gates_solo_tab.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fevusavumerow.rf.gd/copper_gauge_to_mm.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f4eca4f-edaa-419c-bfbd-bbac9b754365/i_robot_full_movie_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44166030-0f1e-497b-8163-01cec11a1571/joe_brown_ill_see_you_in_my_dreams_ukulele_tab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21d9f0c0-b388-4d10-9ab6-a8ebeaf57cbf/72240064245.pdfIn PDF document text
    • http://koguxegutoxexu.rf.gd/a_character_and_the_storyteller_in_one_thousand_and_one_nights.pdfIn PDF document text
    • http://vogojitipam.epizy.com/why_isnt_my_dryer_drying.pdfIn PDF document text
    • http://tasefabomodewiv.epizy.com/mufirugijovojogoruwepexa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41923556-9684-42d3-919c-bb9552576479/cash_flow_quadrant_by_robert_kiyosaki_download.pdfIn PDF document text
    • http://nupituf.epizy.com/xewinelinapa.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_off00012cf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CF5 5564 bytes
SHA-256: 8eeb4d2dc381b4d8771799a2373aa6fb5afb277b007c19181d976a55f822696d
font_01_sfnt_off00013fd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FD9 11052 bytes
SHA-256: ae10b07e0bc75bf14e662544722e058205f26aade7a750d51933fac0445b1a0f

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