Malicious PDF — malware analysis report

Static analysis result for SHA-256 c01117124add4453…

MALICIOUS

PDF

88.5 KB Created: 2021-04-01 09:51:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 49858fc0b35fb9a061dbdf86e0c76874 SHA-1: ddc2e689ea4a4be81e8ec01294a131400c0c466c SHA-256: c01117124add4453916b79f5015113c858834862e652dcdc547b6f7e33c90609
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, identified as a link farm, with the primary URL suggesting a lure related to 'Ielts academic vocabulary pdf'. Heuristics indicate this is a malicious PDF, and ClamAV detected it as Pdf.Phishing.Trojan. While no scripts were explicitly extracted, the PDF structure and the nature of the links suggest it is designed to redirect users to potentially malicious websites, possibly for phishing or malware distribution. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://mezovuduw.ru/award?keyword=ielts+academic+vocabulary+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4452217/normal_605e1163224ab.pdfIn PDF document text
    • https://ronafipilegov.weebly.com/uploads/1/3/2/6/132681204/8085531.pdfIn PDF document text
    • https://pogixadajunoje.weebly.com/uploads/1/3/4/6/134661749/toxete.pdfIn PDF document text
    • https://molowusutet.weebly.com/uploads/1/3/1/3/131380828/begobe_tufalam_rovidorumizar_fesajukidejof.pdfIn PDF document text
    • https://binigikuvoloxog.weebly.com/uploads/1/3/5/3/135332024/a1269afa76a.pdfIn PDF document text
    • https://giravegide.weebly.com/uploads/1/3/2/6/132681237/052cfd.pdfIn PDF document text
    • https://dotolisode.weebly.com/uploads/1/3/4/6/134616401/viwimu-tafijosoxakogut-nuwete-texavubida.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4394061/normal_5fed3f77682a2.pdfIn PDF document text
    • https://turugoduzo.weebly.com/uploads/1/3/0/7/130739986/6012685.pdfIn PDF document text
    • https://rewazute.weebly.com/uploads/1/3/4/6/134648352/9405220.pdfIn PDF document text
    • https://kapalane.weebly.com/uploads/1/3/0/9/130968981/9083618.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402956/normal_6040b350529a2.pdfIn PDF document text
    • https://nojijakifon.weebly.com/uploads/1/3/4/0/134012839/kiwunapo-meperofedu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489733/normal_5fcd8abdcbf16.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/b26f1ce6-30a9-4826-83b0-c1a521335061/lord_of_flies_movie_rating.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d363728f-f037-4e09-9d6a-5f150fdb7ba5/letra_de_la_cancion_stressed_out_en_ingles_perfect.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba5a6f6a-6398-44ae-9206-2a1070c3ffe5/is_louis_in_queen_of_the_damned_movie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4a986cf-c180-4770-846b-25fe3a17d17d/why_jodi_arias_murdered_travis_alexander.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb86442c-673c-4468-862b-f310dc0afcd9/history_of_the_world_in_6_glasses_questions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27c744cc-f982-4f7e-ae66-89fcd28f2ffb/vozoferusosiguwi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a1060b7-4ccf-474c-88ec-bdbbd2a5d48d/should_the_federal_government_abolish_the_death_penalty.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f295099-4ce5-4655-9e88-6feb8fc2f8f1/nordictrack_elliptical_audiostrider_990_specs.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_off00011bd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BD2 5540 bytes
SHA-256: 937b364895f97ae0bb0fee99e6b97c03b5a25962cfe343db9593744669ce5e94
font_01_sfnt_off00012e97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E97 10996 bytes
SHA-256: 8d8f1d8ce0b48b641374ef1c52138511f2b57b404f3dc6f3061ee223471be75d

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