Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3d1462ca603605d…

MALICIOUS

PDF

75.6 KB Created: 2021-04-02 07:23:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: d2cc3fe6e8dbda871eac3febd1e78966 SHA-1: c8381d6620d8e0156a69eadbd312e4c22a0e5e4f SHA-256: e3d1462ca603605d40e055baf6061699423e73c30b3304ab176dca3e951febf4
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs pointing to potentially malicious domains, identified by heuristics like PDF_SEO_DISPOSABLE_LINK_FARM and ML_NYX_PDF_MALICIOUS. ClamAV also detected it as Pdf.Phishing.Trojan. The presence of embedded URLs suggests an attempt to redirect users to phishing or malware-hosting sites, aligning with a spearphishing attachment attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://lozipotod.ru/award?keyword=alphabet+letters+designs+pdf PDF link annotation
    • http://kutatit.getenjoyment.net/dapebodokonawagikigunu.pdfIn PDF document text
    • https://kixipebirivevex.weebly.com/uploads/1/3/0/7/130739750/8914000.pdfIn PDF document text
    • https://cdn.sqhk.co/kapokosop/dVFihjf/hp_smart_ink_tank_530_wireless_printer_review.pdfIn PDF document text
    • http://liwexun.mywebcommunity.org/zepezukizixipavunomikapa.pdfIn PDF document text
    • https://pomudimukiribob.weebly.com/uploads/1/3/5/3/135313003/jewoxobalil.pdfIn PDF document text
    • http://dunigaki.22web.org/wutofaxekasagewikevij.pdfIn PDF document text
    • https://lorebanoga.weebly.com/uploads/1/3/0/7/130738704/4163091.pdfIn PDF document text
    • https://cdn.sqhk.co/bisadidizi/gihfhgz/download_wechat_android_4._1._2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371783/normal_601c7de4866a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471234/normal_60236f5ed536e.pdfIn PDF document text
    • https://cdn.sqhk.co/ragojagef/iihatpT/digestive_system_definition_in_english.pdfIn PDF document text
    • http://mitatizizuje.mypressonline.com/pros_and_cons_of_studying_abroad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470024/normal_6056a7932b72c.pdfIn PDF document text
    • https://cdn.sqhk.co/vuxitiwawi/ZBELFK3/are_great_pyrenees_good_farm_dogs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379483/normal_604f19357549d.pdfIn PDF document text
    • http://gatowixipeba.mywebcommunity.org/57409118194.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gaxodusipif.epizy.com/speaking_exercises_for_english_learners.pdfIn PDF document text
    • http://tuminexozuvino.atwebpages.com/cobra_29_nw_ltd_classic_cb_radio_manual.pdfIn PDF document text
    • http://supuwevul.atwebpages.com/acer_iconia_tab_a200_replacement_digitizer.pdfIn PDF document text
    • http://mupopeseri.rf.gd/international_phonetic_alphabet_english_words.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_off0000ec7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC7A 5432 bytes
SHA-256: 63f410f251f5b894740c870d6b688b6915e833506a90ca03b172df40d5cb9a21
font_01_sfnt_off0000fee6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEE6 10052 bytes
SHA-256: 7e47ff586f4b3a3dbbf84420551b42ee9948a0b58d1c4de71a3c564dd9b0af56

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