Malicious PDF — malware analysis report

Static analysis result for SHA-256 8976a80fb1465b00…

MALICIOUS

PDF

73.9 KB Created: 2021-05-07 18:08:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: ab922eb03f3096430c776f74aa699d83 SHA-1: 222e52aab7361cbee00d0d232defc278d2a941a0 SHA-256: 8976a80fb1465b001b4690874659d430ba7b3cede1e640fbcfd3217df2e0f69a
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains a lure related to an outboard motor, which redirects to a suspicious URL. This URL is flagged as an SEO redirector for free-download phishing. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing a second-stage payload.

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
  • 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://fokemale.ru/strik?utm_term=johnson+25+horse+outboard+motor PDF link annotation
    • http://kinemulawaw.sportsontheweb.net/10704510393.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446162/normal_5fd161f236460.pdfIn PDF document text
    • http://rivepozepuxar.mywebcommunity.org/pinavobatefikut.pdfIn PDF document text
    • http://zosuwalerikare.getenjoyment.net/constant_acceleration_problems.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491155/normal_60065e9d611e7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482415/normal_6007a66c18e5a.pdfIn PDF document text
    • http://nigavereke.mygamesonline.org/how_to_tell_what_personality_type_you_are.pdfIn PDF document text
    • http://kaboliwup.mypressonline.com/gunujose.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447646/normal_5fd6571a83254.pdfIn PDF document text
    • http://jorowijedo.mywebcommunity.org/biochemical_tests_for_bacterial_identification.pdfIn PDF document text
    • http://rivoduzajoki.iblogger.org/99316241680.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446174/normal_60537bc0dd657.pdfIn PDF document text
    • http://sixesijilolun.mywebcommunity.org/lebiru.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403283/normal_5ff9c259993bd.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/pidufozu/wow_classic_in_game_leveling_guide_addon.pdfIn PDF document text
    • https://s3.amazonaws.com/zubuwujoxom/amino_acids_list_and_structure.pdfIn PDF document text
    • https://s3.amazonaws.com/nitatotol/panasonic_phones_manuals_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/bifamomove/46530344134.pdfIn PDF document text
    • http://xebizeluzifavi.rf.gd/cbse_guide_ncert_solutions_class_10_science.pdfIn PDF document text
    • http://naranosufok.atwebpages.com/35399548673.pdfIn PDF document text
    • http://powosegunivu.epizy.com/adobe_fresco_apk_free.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_off0000e5fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5FC 5416 bytes
SHA-256: c2f3446b7974b4d12adf12efbe37a0b1d453ae23000d74e7770f2c9b820452a2
font_01_sfnt_off0000f842.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF842 10352 bytes
SHA-256: 9e01bf84092615ba9bc01e42c3ad841c815f95d172826986f0fe623f3ec2a300

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