Malicious PDF — malware analysis report

Static analysis result for SHA-256 0162fca33fd55d99…

MALICIOUS

PDF

77.6 KB Created: 2021-05-01 11:11:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3d4fa55075cfc8f77eee6b6d878a3248 SHA-1: ca6964e957335a38791c98aa4eed9ee4850daf06 SHA-256: 0162fca33fd55d99537873df169c7e92c9321b158ca03cd1436828fbff12305a
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, suggesting a malicious intent to redirect users. One of the primary URLs, 'https://botokaw.ru/strik?utm_term=tanning+salons+open+today+near+me', is directly associated with the document's content and is flagged as suspicious. The ML classifier and ClamAV detection strongly indicate maliciousness, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://botokaw.ru/strik?utm_term=tanning+salons+open+today+near+me
    • http://waxedeb.getenjoyment.net/xadigizobokunezozazoxera.pdf
    • http://reduslimitalia.site/the_complete_turtletrader_review58kja.pdf
    • http://nigemutekilum.mypressonline.com/free_printable_blank_bingo_cards_for_teachers.pdf
    • https://wevofuru.weebly.com/uploads/1/3/4/6/134670173/7665613.pdf
    • http://koxivesuvif.mypressonline.com/melex.pdf
    • https://datevasipagudi.weebly.com/uploads/1/3/0/8/130874205/1942398.pdf
    • https://zetizisoxaw.weebly.com/uploads/1/3/4/4/134498522/parekilorotojamo.pdf
    • http://djami.ru/thanksgiving_alphabet_worksheets_for_kindergartenfh57g.pdf
    • https://togurekeve.weebly.com/uploads/1/3/4/0/134040335/sebebafoxajazon.pdf
    • http://kusukeluwabe.mywebcommunity.org/xevoxe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/vonusirukete/picsart_gold_unlocked_apk_free.pdf
    • https://s3.amazonaws.com/fekaduvopigab/a_constructor_can_access_which_of_the_following.pdf
    • http://telusomabufa.onlinewebshop.net/tasibexavusajonixaju.pdf
    • http://bixozebaxikapos.atwebpages.com/tobojejatowika.pdf
    • https://s3.amazonaws.com/gofiguj/13316631622.pdf
    • http://bipegokatif.onlinewebshop.net/80320868923.pdf
    • http://mifojizu.myartsonline.com/85682599775.pdf
    • https://s3.amazonaws.com/memobofilenabon/where_to_buy_skyworth_remote_control.pdf
    • http://gukutimaguvuzum.onlinewebshop.net/browns_2020_schedule.pdf
    • https://s3.amazonaws.com/bejideba/14504614368.pdf
    • https://s3.amazonaws.com/minabiwa/aiou_assignments_answers_2019.pdf
    • https://s3.amazonaws.com/nuxepiduded/janewezesezezuxuro.pdf
    • https://s3.amazonaws.com/nisiwanolom/60748305296.pdf
    • https://s3.amazonaws.com/betefowubevat/73548058367.pdf
    • http://xunudijumo.myartsonline.com/27095689051.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dff5.bin
743f3768445357ca06599602c5d7ea0db39476e1f51d098ca85c014d2622b64d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDFF5 5116 bytes
font_01_sfnt_off0000f148.bin
27c68973f792961f982e010ebdc28ca447c143edc0029fc20c5213889cd5536e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF148 11796 bytes
font_02_sfnt_off000118e2.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x118E2 4324 bytes

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