Malicious PDF — malware analysis report

Static analysis result for SHA-256 94d350ce9d4cb756…

MALICIOUS

PDF

131.4 KB Created: 2021-04-08 01:30:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 5e53326bd996cd0facb6b3fbb88ad549 SHA-1: 2b0c3d04d08af7a1054a30d4566b0e542b4ffe90 SHA-256: 94d350ce9d4cb756aaf25da6dc6397c7d02b086e2c9709b23c4e994c8b92d3cc
196 Risk Score

Malware Insights

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

This PDF document contains numerous external links, many of which are part of an SEO link farm designed to redirect users to potentially malicious content. The primary lure appears to be related to rooting Android devices, as indicated by the URL keyword. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/wix?keyword=best+root+apk+for+android+6.0.1 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4481280/normal_5fe01a9eea2a0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370767/normal_6047c9b482314.pdfIn PDF document text
    • https://sagezawi.weebly.com/uploads/1/3/4/3/134322896/7566086.pdfIn PDF document text
    • https://sarisakela.weebly.com/uploads/1/3/5/3/135308925/3621c982bff.pdfIn PDF document text
    • https://xomowozijirogap.weebly.com/uploads/1/3/4/6/134667332/6660215.pdfIn PDF document text
    • http://fefikaniki.22web.org/lupunuwirupavifigogozanog.pdfIn PDF document text
    • https://nemulokisen.weebly.com/uploads/1/3/4/4/134492012/roduvumawed-jununotinijad-xafopi.pdfIn PDF document text
    • https://fotejisatowonu.weebly.com/uploads/1/3/2/3/132302873/5801712.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/a15861a7-5625-46db-a9cb-00dfd24fc37c/you_can_say_meaning_in_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/sinadi/gilewaxifupenotojob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0625c94d-790c-49eb-a7e0-33171ebbd17f/38761258822.pdfIn PDF document text
    • https://s3.amazonaws.com/robumuduluwise/change_notification_icon_color_android_studio.pdfIn PDF document text
    • https://s3.amazonaws.com/fajeloninesitel/11373001288.pdfIn PDF document text
    • http://wozabuposeg.epizy.com/kazizijalom.pdfIn PDF document text
    • https://s3.amazonaws.com/tometubufimopim/voltage_drop_calculator_excel_format.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/164425bd-9a2c-4c94-b3b5-4c09eb395243/computer_pc_power_supply_tester.pdfIn PDF document text
    • https://s3.amazonaws.com/firigugixujotov/casio_hr_100_manual.pdfIn PDF document text
    • http://milemiteloxodu.rf.gd/lesowonoduxoboxaselanag.pdfIn PDF document text
    • https://s3.amazonaws.com/tezude/whirlpool_microwave_parts_list.pdfIn PDF document text
    • https://s3.amazonaws.com/xepululejiwof/why_does_my_samsung_refrigerator_ice_maker_keep_freezing_up.pdfIn PDF document text
    • https://s3.amazonaws.com/kiremefegonar/86042139118.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64093616-ccc0-4670-8553-884a01e634b2/kibelasizaxoxagav.pdfIn PDF document text
    • https://s3.amazonaws.com/bisiku/93806040981.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0001c362.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1C362 33956 bytes
SHA-256: 9d4fc0fe13e986ab63ebc6915ba3ba5da79cd07c83a122442898b183c5c36a23
font_00_sfnt_off00019040.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19040 5496 bytes
SHA-256: 9f52926263a4b9a900039a0e1b269b9214c6e6c8587062c2408fdbdff60a2838
font_01_sfnt_off0001a30c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A30C 9364 bytes
SHA-256: 13eccc720f44a2b1f89fd02969203fe23e343bc827afbd391b448b2fe213cdd0