Malicious PDF — malware analysis report

Static analysis result for SHA-256 b44cca8d815d51cc…

MALICIOUS

PDF

95.6 KB Created: 2021-03-20 06:22:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 777d6a8e41665f272a2cbea41a6f907a SHA-1: 7bf19194471b08a49913dfcf25545bbb3f464161 SHA-256: b44cca8d815d51cce35b0709f9549d15bbe5f4bd58f6dbf1366586fca158a4cf
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, 'jumiwimov.ru', which is likely used to host a phishing page or distribute further malware. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, and the presence of embedded URIs is a strong indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jumiwimov.ru/wix?keyword=krakens+rum+in+treasure+diving+games
    • https://pexagizim.weebly.com/uploads/1/3/0/9/130969673/lexedodagemulawef.pdf
    • https://roparinupiw.weebly.com/uploads/1/3/5/3/135392621/ligigejofowina.pdf
    • http://xajavawinereko.mywebcommunity.org/rasumitadiduxaxaj.pdf
    • http://vomimaforotagi.mywebcommunity.org/60946540929.pdf
    • http://civiliscmq.online/necromunda_rulebook_2018_vkmgyx7.pdf
    • https://depopuxa.weebly.com/uploads/1/3/4/8/134893869/3dc1729.pdf
    • http://lozhobelir.space/luzuvipetuxatovuredebumoljwip.pdf
    • http://teguruta.medianewsonline.com/30973248597.pdf
    • http://phulop.store/blackjack_online_for_moneyer9gt.pdf
    • http://sepoxudozixo.sportsontheweb.net/dior_forever_skin_glow_2w_review.pdf
    • https://miwebakoz.weebly.com/uploads/1/3/4/8/134862152/ruwiwawakesiku.pdf
    • http://rogemuso.iblogger.org/how_to_change_code_on_schlage_fe575.pdf
    • https://gawudizilox.weebly.com/uploads/1/3/5/3/135300959/bexevakusowun-dexelodemadif-joxekijifeponaf-bonese.pdf
    • https://suwanofanezelon.weebly.com/uploads/1/3/1/6/131636577/nipamid_wijalokafuwev.pdf
    • https://vopakumadojaga.weebly.com/uploads/1/3/4/3/134361244/dowimuzujuvog-nuliwef-kewonuw-laguwoku.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/47c0e17f-fdef-4993-9c4d-e04d38eb99ff/in_adam_all_have_sinned.pdf
    • http://xobibaga.myartsonline.com/ncert_books_class_8_english.pdf
    • http://pewatenibojip.rf.gd/bezorudomut.pdf
    • http://vowurereluvox.epizy.com/best_quotes_from_holding_up_the_universe.pdf
    • https://uploads.strikinglycdn.com/files/b7f72e95-5ed9-44ed-8f1b-901b5d0f3410/kunesigejutufazotil.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011fd8.bin
6386a34125c4cba54182248ea3afc89eed06b4aad60366f09bf2ab4681cf2330		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11FD8 5208 bytes
font_01_sfnt_off0001317c.bin
cee7569f0b512f097a30b217cb8e4620f58d8bb3b7bf2e755afb463c3db9711d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1317C 12340 bytes
font_02_sfnt_off00015b00.bin
dbe1f6873dfbc63a557840fa26764ed1e24daf10180a919a5f50e881975b6f06		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15B00 16148 bytes

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