Malicious PDF — malware analysis report

Static analysis result for SHA-256 73689243a372fbc4…

MALICIOUS

PDF

76.6 KB Created: 2021-04-05 00:58:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b86e474679dd45eb075ed686c55756c7 SHA-1: b541119e42e0aa5610baa167f9ecc88c639e1eae SHA-256: 73689243a372fbc44cb05a424f146b4dfb01df57ac9a244dd8dcc2887546861b
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains an embedded URI that directs users to a suspicious domain, likely for phishing or malware distribution. The document body, though heavily obfuscated, appears to be a lure related to a search query, suggesting a social engineering tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 4

  • 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://dafemum.ru/aws?utm_term=what+boy+names+start+with+ro
    • https://cdn-cms.f-static.net/uploads/4422392/normal_602aafd0a807d.pdf
    • https://cdn-cms.f-static.net/uploads/4468550/normal_6058beb339821.pdf
    • http://rakufudufe.iblogger.org/what_is_engaging_communication.pdf
    • http://sukutoxuwurif.mywebcommunity.org/waterpik_water_flosser_tips_amazon.pdf
    • http://bighome.space/sexogemijotivyyl2i.pdf
    • http://groshyk.site/punchline_algebra_book_b_answer_key28ni1.pdf
    • https://jadekida.weebly.com/uploads/1/3/4/3/134349878/jodetosegebak.pdf
    • http://waragofekoxexaz.sportsontheweb.net/bhajanavali_malayalam.pdf
    • http://kofojoxake.mygamesonline.org/metaphysical_anatomy.pdf
    • http://korogesubelokut.mypressonline.com/middle_of_the_night_paddy_chayefsky.pdf
    • https://static.s123-cdn-static.com/uploads/4424405/normal_5fcbf2fb01a62.pdf
    • https://jerupixudenaxi.weebly.com/uploads/1/3/1/4/131437293/pizuzip.pdf
    • http://sivelural.mygamesonline.org/employment_offer_letter_sample.pdf
    • https://zebewanuvaxa.weebly.com/uploads/1/3/4/6/134613040/pewif.pdf
    • http://pixell.store/used_dixie_chopper_silver_eagle_for_sale7qhze.pdf
    • https://cdn-cms.f-static.net/uploads/4462696/normal_601ec34c575d4.pdf
    • https://sefokuto.weebly.com/uploads/1/3/0/7/130738721/wajakubugebojulo.pdf
    • https://fuwiposodunumof.weebly.com/uploads/1/3/1/4/131438128/ad9affd5.pdf
    • https://cdn-cms.f-static.net/uploads/4455185/normal_604d736c44d91.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://sifebitufol.onlinewebshop.net/40667823450.pdf
    • http://positajugopisu.myartsonline.com/54315723605.pdf
    • http://xesovukefezusag.rf.gd/pegiwaxasitudaterafozig.pdf
    • http://tiruweditivunaw.myartsonline.com/41202734738.pdf
    • http://lagunuriteg.rf.gd/dewey_decimal_classification_for_autobiography.pdf
    • http://zazaluvuzusu.rf.gd/rixugowef.pdf
    • http://gojeduxodevesif.epizy.com/28982190069.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef59.bin
b2d9a511471b75cdf7ea142a7686cd72b27d8963836e53dd9eef90c92790a283		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF59 5240 bytes
font_01_sfnt_off00010115.bin
80cabbe1526ff7b8e46aabbbf9d8b889fb6c0faddc15effdc8b59017f5aa6964		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10115 10472 bytes

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