Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e2d64438d72dd6e…

MALICIOUS

PDF

88.8 KB Created: 2021-03-25 01:28:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 7d01d13de746b210af9ed3a238e29695 SHA-1: ccf4f6c2fa745956a0b73bcd39d03ceb374f849c SHA-256: 4e2d64438d72dd6edd863a5516fb3394a38ba37acf28ada560780c2a11abcc10
196 Risk Score

Malware Insights

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

The PDF contains a link farm and an SEO redirector disguised as a book download lure. The primary malicious URL identified is https://gimoguvi.ru/strik?utm_term=percy+jackson+the+sea+of+monsters, which is likely used to deliver a secondary payload or redirect to a phishing site. ClamAV and ML classifiers also flagged this PDF as malicious, indicating a high likelihood of phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://gimoguvi.ru/strik?utm_term=percy+jackson+the+sea+of+monsters PDF link annotation
    • https://vijekufimukij.weebly.com/uploads/1/3/0/9/130969895/sulesakufafolax.pdfIn PDF document text
    • http://rukozhop-guide.com/malayalam_audio_songs_free_siteswwld7.pdfIn PDF document text
    • http://detonic-italia.website/70730024049r9qz7.pdfIn PDF document text
    • https://nawenakugod.weebly.com/uploads/1/3/6/0/136048640/lewojozuzidejonemubi.pdfIn PDF document text
    • https://netulomite.weebly.com/uploads/1/3/2/8/132814473/09179e04.pdfIn PDF document text
    • https://pibefabetanob.weebly.com/uploads/1/3/4/3/134376782/madudejakojawe.pdfIn PDF document text
    • https://radumudoxelis.weebly.com/uploads/1/3/4/2/134235428/fitubunova.pdfIn PDF document text
    • http://lizakoku.22web.org/free_telugu_bhajan_songs.pdfIn PDF document text
    • http://kujedepis.22web.org/what_does_bills_of_exchange_mean.pdfIn PDF document text
    • http://vashastrahovka24.ru/make_every_man_want_you_book055pk.pdfIn PDF document text
    • https://guwemegarorara.weebly.com/uploads/1/3/4/3/134353603/28a6fdeb1c37.pdfIn PDF document text
    • http://just-gopro.com/popokika538dj.pdfIn PDF document text
    • https://namosozevo.weebly.com/uploads/1/3/0/9/130969937/xirixibari_wikurejaw.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/rabewiruzitewa/boxadokoma.pdfIn PDF document text
    • https://s3.amazonaws.com/dakebesuvum/6691435483.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/404c9cd5-1932-4eab-8279-e7deb74b342e/gaberosukovapofaze.pdfIn PDF document text
    • http://nepokuwaporot.rf.gd/search_a_on_ipad.pdfIn PDF document text
    • https://s3.amazonaws.com/xupimaral/vaxogamorukelepodura.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/216677cf-ba2f-472c-8638-cb69a183ef4b/the_design_of_the_unix_operating_system_solution_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/feborobegibew/naruto_blazing_mod_apk.pdfIn PDF document text
    • http://gevorewububew.epizy.com/they_say_i_say_book_works_cited.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc5b17ef-4735-41d9-a66e-2d384408c860/75836017415.pdfIn PDF document text
    • https://s3.amazonaws.com/vajefam/zopelilipobe.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_off00011b41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B41 5332 bytes
SHA-256: 2e31c73cac5bf683a8d8416e62220f74a05358289c09cfe30877709693cb11b9
font_01_sfnt_off00012d4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D4D 11688 bytes
SHA-256: a529374dafb0586109644fee51c9d4dd47c3f5f6de62a14efdf07ac44300dcb5