Malicious PDF — malware analysis report

Static analysis result for SHA-256 b10a332ba61d6fd8…

MALICIOUS

PDF

81.9 KB Created: 2021-03-15 22:00:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 09fd4b4bceefd20789bd161a75cfe4b5 SHA-1: 0e7fe7b2af703a6b23f1f001ea428447cd7b7641 SHA-256: b10a332ba61d6fd89d85109e91f3fa56ca56cb7e8ccdcab005fb9d4c4dd01947
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The sample was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs pointing to external sites, suggesting a lure to phishing pages or malware downloaders. The PDF structure and embedded links are consistent 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://jacksth.ru/strik?utm_term=2005+jeep+grand+cherokee+limited+5.7+hemi+problems PDF link annotation
    • http://ramuwesitavoz.mywebcommunity.org/does_procreate_have_a_tutorial.pdfIn PDF document text
    • http://tulusujubige.mygamesonline.org/bnf_2020.pdfIn PDF document text
    • https://debegibur.weebly.com/uploads/1/3/4/3/134308456/vifufi-gelelajuxedoxaz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405413/normal_5ff1c767d8e90.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468823/normal_603e60fd0effb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416304/normal_6041d16f4e11f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459182/normal_600f7ec26ff60.pdfIn PDF document text
    • https://jatekowi.weebly.com/uploads/1/3/0/7/130776123/wuraxex-zokogaru-pebidamav-zapopumepaso.pdfIn PDF document text
    • https://dotuxebi.weebly.com/uploads/1/3/1/4/131454754/9268988.pdfIn PDF document text
    • https://fiwigerisen.weebly.com/uploads/1/3/1/4/131408459/manofa_xonatabubotabop_wifomovadudisim_resijakaj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://liroporuki.myartsonline.com/maze_runner_cast_dancing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6242db7-9a58-4706-a0b9-f8909e22ac22/excel_spreadsheet_formulas_for_dummies.pdfIn PDF document text
    • http://ropupifalapoges.atwebpages.com/zetipek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c727e579-5835-44c1-b433-97958917fee0/14665793017.pdfIn PDF document text
    • https://s3.amazonaws.com/silubebebefuju/55238846867.pdfIn PDF document text
    • https://s3.amazonaws.com/gupawupigawono/87568794967.pdfIn PDF document text
    • https://s3.amazonaws.com/gixirojozogufux/will_netflix_make_a_season_2_of_the_witcher.pdfIn PDF document text
    • https://s3.amazonaws.com/tugabijenovili/tusevafi.pdfIn PDF document text
    • https://s3.amazonaws.com/tometubufimopim/is_jack_reacher_2_on_amazon_prime.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/480aae8b-c163-4ea1-a518-d77269f09274/56648972980.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_off000101a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101A6 6180 bytes
SHA-256: 4cc74a04898b0057b463359e5034abcb64f69e8f4146f48be65a9d017844015d
font_01_sfnt_off0001168e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1168E 10188 bytes
SHA-256: f97be149ca97f37fe7a826beedc3d8eb0879376116d7b5adc38f4e6e98fae38b

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