Malicious PDF — malware analysis report

Static analysis result for SHA-256 36f8d0716ab21824…

MALICIOUS

PDF

78.4 KB Created: 2021-03-28 20:17:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bf2d62973cd2e0db139300f1823cf616 SHA-1: 514aaa964bf173f6fdd6a07a6d3a5107b1212349 SHA-256: 36f8d0716ab21824d0bd612cce3e294a0e86f830fd6061bc4eca55bc23bd4b99
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains numerous external links, a common tactic for SEO poisoning and phishing. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' strongly suggests the document's content is designed to trick users into believing they are entitled to a prize or funds, requiring them to interact with malicious links. ClamAV detection and ML classification further support its malicious nature. While no scripts were explicitly extracted, the PDF structure and link farm indicate an attempt to redirect users to malicious sites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://soxebez.ru/wix?keyword=tablet+pc+mid+android+user+manual+pdf
    • https://cdn.sqhk.co/fifusaji/cie3nR8/30479023075.pdf
    • https://fibukumaguwin.weebly.com/uploads/1/3/4/7/134770434/fubazekufeginexozi.pdf
    • https://cdn.sqhk.co/nugizape/hbgjgeO/masafolirokepu.pdf
    • https://cdn.sqhk.co/wufevinek/hhihcvF/wwe_raw_news_and_results_bleacher_report.pdf
    • http://luloxijemise.medianewsonline.com/80124405529.pdf
    • http://prequester.online/android_1_bloons_td_battlesigrg2.pdf
    • http://xevamoz.mygamesonline.org/adverb_of_time_exercises_with_answers.pdf
    • http://jatudoz.getenjoyment.net/99005445829.pdf
    • https://cdn.sqhk.co/sazoteva/sQiil7S/35656021612.pdf
    • http://avtoshtorki.shop/george_orwell_shooting_an_elephant_rhetorical_analysisqyzyd.pdf
    • https://cdn.sqhk.co/boxewemutox/xjbEXii/28604143572.pdf
    • https://cdn.sqhk.co/sexasegavon/Rhfgdhf/601598973.pdf
    • https://cdn.sqhk.co/zabitokepum/djc4haq/peluwusolawaxekigu.pdf
    • http://thrivewebs.com/where_do_mutt_dogs_originate_from7v4ww.pdf
    • http://fuckfrsky.com/student_ka_full_form_kya_hogay54zl.pdf
    • http://kevebofuru.medianewsonline.com/nomasoge.pdf
    • https://cdn.sqhk.co/relulapezele/gddBk6q/missing_megan_nichols.pdf
    • https://vokuduvalabi.weebly.com/uploads/1/3/4/5/134502282/jamenukizup.pdf
    • https://cdn.sqhk.co/toruwapelot/ifsiahe/30986655089.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jakujakula/standard_business_card_template_illustrator.pdf
    • https://s3.amazonaws.com/fajetufekejo/conversion_factor_practice_problems_and_answers.pdf
    • https://s3.amazonaws.com/wavunot/alkaline_diet_foods_recipes.pdf
    • https://s3.amazonaws.com/sukobogixe/vimedetizanesu.pdf
    • https://s3.amazonaws.com/gebukil/nagpuri_hip_hop_dance_hd_video.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_off0000f369.bin
5088858ad5012b1e42ef515f22936b15b2aedeb82376ab384669eea53a27a265		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF369 5392 bytes
font_01_sfnt_off00010598.bin
cac98be68611695dfc29be732c8af5f7e63eedf4f0adb3fbd47fcf96b23713b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10598 11088 bytes

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