Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d216f5b2ba088ec…

MALICIOUS

PDF

74.1 KB Created: 2021-02-27 20:10:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: d494f7cb8355ef5c4380f9f9fceeb9a0 SHA-1: fb42ce459d8bb1940d55d19162c13190bc2cf34f SHA-256: 7d216f5b2ba088eca70ccc99a44ccdac1b24cec28680043d744acd9863605e67
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with one prominent URL pointing to 'dugedepap.ru' which is presented as a search result for a specific product. This suggests the document is designed to redirect users to a potentially malicious site, likely for phishing or malware distribution. No scripts were extracted, but the PDF structure and embedded links are indicative of a common phishing lure.

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://dugedepap.ru/award?keyword=dewalt+miter+saw+dust+collection+size PDF link annotation
    • https://bobilemako.weebly.com/uploads/1/3/4/7/134733435/9b5de89891d8.pdfIn PDF document text
    • https://pibulibeles.weebly.com/uploads/1/3/5/3/135324177/nefufobutupos.pdfIn PDF document text
    • http://mamontov-net.cc/six_sigma_green_belt_project3a9up.pdfIn PDF document text
    • http://qwert-ita.fun/lojesorojewujonen2bjrk.pdfIn PDF document text
    • http://rexevivejegox.scienceontheweb.net/what_is_breaking_news_today_in_india.pdfIn PDF document text
    • http://bit7.top/2006_lanternfish_esl_answersqxtai.pdfIn PDF document text
    • https://jomefexud.weebly.com/uploads/1/3/4/7/134732593/8576241.pdfIn PDF document text
    • http://sodowetan.mywebcommunity.org/xijajafaneduwarudezusowa.pdfIn PDF document text
    • http://najariza.iblogger.org/zumivuvuje.pdfIn PDF document text
    • http://nosinoski.shop/kabutumudiwu26n5y.pdfIn PDF document text
    • http://jovaguduretup.22web.org/amiga_500_emulator.pdfIn PDF document text
    • http://dekiweragaf.mywebcommunity.org/63293289853.pdfIn PDF document text
    • http://tifusavegapawuf.mygamesonline.org/is_the_book_divergent_appropriate.pdfIn PDF document text
    • http://gemubanabugawa.mypressonline.com/weight_watchers_scales_manual_ww710a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gofilafixu/creating_brand_equity.pdfIn PDF document text
    • http://jizuwugi.rf.gd/ample_guitar_m_lite_vst.pdfIn PDF document text
    • http://molagegivijoxu.onlinewebshop.net/76906654311.pdfIn PDF document text
    • https://s3.amazonaws.com/geradi/guided_reading_books_level_a.pdfIn PDF document text
    • http://zitasixan.atwebpages.com/57954376574.pdfIn PDF document text
    • https://s3.amazonaws.com/fajetufekejo/52753801032.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_off0000e4e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4E3 5224 bytes
SHA-256: 2fe9b1f3e67b2a7ca403ba1065024b4d668ac17cbdd93e1a6c0c859de6ccf7fa
font_01_sfnt_off0000f6b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6B0 10592 bytes
SHA-256: 6d62a05b5a59b2ba2fcfeccabfdd7024a404ab85a72194cf3812ea43c95e9338

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