Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb29df4432a5ce30…

MALICIOUS

PDF

89.8 KB Created: 2020-11-24 04:11:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 24191d32dc1ea0b00798d7d0d04b46f7 SHA-1: dd581938e7a649877551c9537235e2dea4798e32 SHA-256: fb29df4432a5ce30c8b2cf616f584feab655687d05158a965f1065ef92e8dc84
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains heuristics indicating it is a malicious phishing document, specifically designed to lure users with the promise of a game cheat code generator. It embeds external links, one of which leads to a URL associated with game-related search terms, and another points to a large collection of PDFs, suggesting a link farm. ClamAV detection further confirms its malicious nature as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://trafftec.ru/123?utm_term=gta+4+unlock+code+and+serial+key+generator
    • https://sebanibukuj.weebly.com/uploads/1/3/4/3/134354661/jokuvajor_wagabajobixeva.pdf
    • https://rogidalot.weebly.com/uploads/1/3/1/6/131636841/443943.pdf
    • https://ruvetuse.weebly.com/uploads/1/3/4/6/134618438/jesavuniwis.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.opentle.org
    • https://s3.amazonaws.com/xedewofuretujo/rte_admission_form_2019-_20.pdf
    • https://uploads.strikinglycdn.com/files/00910775-c6ac-4ccc-b3d7-53c8a5120572/nibutuxuzekasipuxivol.pdf
    • https://s3.amazonaws.com/wixamupelinere/33245647172.pdf
    • https://uploads.strikinglycdn.com/files/4b5d84a0-a569-41e0-ae1f-5283e24f8a1f/figurative_language_activities_for_middle_school.pdf
    • https://uploads.strikinglycdn.com/files/a19e489c-2bc9-480c-8eb4-0151f07b2501/tournament_of_power_eliminations.pdf
    • https://s3.amazonaws.com/nuxulikiwab/linkedin_login_button_android.pdf
    • https://s3.amazonaws.com/risisipajole/custom_shape_die_cut_business_cards.pdf
    • https://uploads.strikinglycdn.com/files/b3195774-bc4f-4cd0-b6ea-7727d2c9bd98/hud_pbv_guidebook.pdf
    • https://s3.amazonaws.com/xebuvuwov/paul_mitchell_tea_tree_hair_and_body_moisturizer_leave_in_conditioner.pdf
    • https://s3.amazonaws.com/lakadutof/architects_draw_freehand_fundamentals.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://www.gnu.org/licenses/gpl.html

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa62.bin
cc527066a4f7d3299ec03dcd5815c4bc829fc17ff987f1bb56e893fe6567e266		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA62 5292 bytes
font_01_sfnt_off00010cbe.bin
84b0d1895c9018a7eba270c78585570bd7fa2490818d63071abeefc8674c8294		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10CBE 5392 bytes
font_02_sfnt_off00011f2e.bin
a2c0eca5f147c209c260b6f6ec4b71eec496cbbb68d0448eec1324df14d0feb4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11F2E 5960 bytes
font_03_sfnt_off00012e6d.bin
da9d663cd38b85a4ad44ccf1611128b3e49e4758dc667739bd6d9f934f84d4d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12E6D 13900 bytes

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