Malicious PDF — malware analysis report

Static analysis result for SHA-256 2427e85063385233…

MALICIOUS

PDF

69.6 KB Created: 2021-03-19 14:08:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 28754d7abaea44997327d831846a0fb4 SHA-1: 0846526411174feb4658bc48a37ee0cc00629397 SHA-256: 2427e8506338523389b0c2459049659f2df1fd0b1a0a5bedf2d8fa42aae6734e
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file is a PDF document flagged as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many pointing to disposable hosting services, suggesting a phishing or scam attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically indicates a link farm on disposable hosting, reinforcing the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://gimoguvi.ru/strik?utm_term=what+does+return+to+sender+mean PDF link annotation
    • https://mesitumavitolo.weebly.com/uploads/1/3/4/8/134866133/benuva_tukaz.pdfIn PDF document text
    • http://islta.fun/probability_and_statistical_inference_10th_edition_free_downloadickh4.pdfIn PDF document text
    • https://buzoraxuv.weebly.com/uploads/1/3/4/3/134366179/070bd4c3.pdfIn PDF document text
    • http://tuzevijubozor.mywebcommunity.org/freckle_juice_chapter_2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501214/normal_5fcf7dc4d19fd.pdfIn PDF document text
    • http://valigulepi.scienceontheweb.net/52769766875.pdfIn PDF document text
    • http://kozugufasuroti.mygamesonline.org/tokagepujakafubusixebise.pdfIn PDF document text
    • https://pamibatofenowa.weebly.com/uploads/1/3/4/5/134525539/9b286b785.pdfIn PDF document text
    • http://tk-time.site/makojarilerunesc2l2u.pdfIn PDF document text
    • http://arbitestpark.xyz/kenirexezutudufumesauwv8q.pdfIn PDF document text
    • http://jalazekesofijot.medianewsonline.com/dofolodaxozefuvaremik.pdfIn PDF document text
    • http://domainlimax.xyz/sodasegomoxorotddty.pdfIn PDF document text
    • http://fazejajogavu.medianewsonline.com/convert_to_word_online_gratis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448547/normal_601f93ee3ae3b.pdfIn PDF document text
    • https://balolenitazir.weebly.com/uploads/1/3/1/0/131071159/4541854.pdfIn PDF document text
    • http://vobafoselalulor.mypressonline.com/44809459276.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/a468f37c-875b-4f1a-a26d-89b136d34617/the_lion_and_the_mouse_video_clip.pdfIn PDF document text
    • http://petojijoxura.onlinewebshop.net/fobuxasisidesemi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/538e872e-8600-48d6-a69e-430b6ea599c0/fizivobinofuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d663e877-e459-44e3-9968-6e68cd4e42ea/vineland_adaptive_behavior_scales_scoring.pdfIn PDF document text
    • http://fuvuvadut.onlinewebshop.net/14945921725.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d480.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD480 5048 bytes
SHA-256: 817d2d0f8bff87121a0d6e814424b51832f814021e50a68ab8f4f468aa727b67
font_01_sfnt_off0000e588.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE588 10400 bytes
SHA-256: dc5dcef6e5ddbad603613ed4a65bf254b477128e68f6b8c4f26f8be1b0cf64f9

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