Malicious PDF — malware analysis report

Static analysis result for SHA-256 722ca424966e13f0…

MALICIOUS

PDF

68.8 KB Created: 2021-03-17 00:15:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: fc49a555d1341a24013356fe10c854b1 SHA-1: baf2782554f0b96fe492663d8ac0f20d4198436e SHA-256: 722ca424966e13f0b4ad982aa82b94297294b119929230040cad5e1afa8da715
196 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which are part of an SEO link farm designed to redirect users to other sites. The heuristic PDF_SEO_LINK_FARM and PDF_SEO_UTM_REDIRECTOR_LINK indicate a phishing or malware distribution attempt. The embedded URLs, such as https://jottigo.ru/wix?keyword=mutants+genetic+gladiators+breeding+guide+apk, are likely used to serve malicious content or further redirect the user. ClamAV also detected this file as Pdf.Phishing.Trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://jottigo.ru/wix?keyword=mutants+genetic+gladiators+breeding+guide+apk PDF link annotation
    • https://vogoworelo.weebly.com/uploads/1/3/4/2/134266182/pakuwidulekodazas.pdfIn PDF document text
    • http://juwaniwabi.medianewsonline.com/4758298766.pdfIn PDF document text
    • https://ruritetij.weebly.com/uploads/1/3/4/7/134704214/677076.pdfIn PDF document text
    • https://garizoruzaxa.weebly.com/uploads/1/3/3/9/133986237/8094842.pdfIn PDF document text
    • https://kibugisire.weebly.com/uploads/1/3/4/0/134018652/bazuginuwoxo-wufazafasiwus-sejuri-wegovu.pdfIn PDF document text
    • http://tisimewifexumi.iblogger.org/emulator_android_studio_untuk_amd.pdfIn PDF document text
    • http://waranijovuv.sportsontheweb.net/cissp_official_practice_test.pdfIn PDF document text
    • https://muwubuzegutan.weebly.com/uploads/1/3/4/6/134649477/6308960.pdfIn PDF document text
    • http://matimomewojime.mypressonline.com/49074590588.pdfIn PDF document text
    • http://bewomas.22web.org/feratot.pdfIn PDF document text
    • http://pugajuxo.iblogger.org/upload_speed_test.pdfIn PDF document text
    • https://furimubabo.weebly.com/uploads/1/3/1/8/131856330/zuluguneva.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wutejaxevewef.myartsonline.com/the_complete_idiots_guide_to_music_theory_by_michael_miller.pdfIn PDF document text
    • https://s3.amazonaws.com/sasufufa/resatanitotifazam.pdfIn PDF document text
    • https://s3.amazonaws.com/medaliwifufugel/how_to_reset_my_kwikset_909.pdfIn PDF document text
    • https://s3.amazonaws.com/tonisefoteka/bput_b._arch_syllabus.pdfIn PDF document text
    • http://zojiwedut.rf.gd/jalunol.pdfIn PDF document text
    • http://podekorutad.rf.gd/cambridge_ielts_9_reading_test_4_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/widiku/xerijexipugebiliniru.pdfIn PDF document text
    • https://s3.amazonaws.com/gajakelegeza/84671291927.pdfIn PDF document text
    • http://tarepos.onlinewebshop.net/55433862887.pdfIn PDF document text
    • https://s3.amazonaws.com/megelugik/dedokobubeme.pdfIn PDF document text
    • https://s3.amazonaws.com/lanaladu/best_new_android_games_april_2019.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_off0000cefc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEFC 5452 bytes
SHA-256: 95d434e29d84267d3f91f487351f2ea50c6a9274f40720155a7c1317f190c6e7
font_01_sfnt_off0000e199.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE199 10744 bytes
SHA-256: 709ab290780b7da4426a0ead632637520b6cbfce8d0b599e813fa2fef3b1f4cb