Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d983d064d8975f5…

MALICIOUS

PDF

96.8 KB Created: 2021-05-22 06:52:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2653c60248801e4fcfd955ef12437640 SHA-1: 459f1e1d3c735b6892872f4b1609acbffded1817 SHA-256: 7d983d064d8975f5000c5947944ce18c4b75d1c5fe815415fa8561eb551c4183
156 Risk Score

Malware Insights

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

This PDF document is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, suggesting a link farm for SEO manipulation or to distribute further malicious content. The primary malicious URL identified is https://dafemum.ru/strik?utm_term=printable+origami+fortune+teller+template, which is likely used to redirect users to harmful sites. No scripts were extracted, but the PDF structure and URL patterns are indicative of a phishing or content-luring attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

Heuristics 5

  • 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
  • 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/strik?utm_term=printable+origami+fortune+teller+template
    • https://suligabewe.weebly.com/uploads/1/3/4/0/134040343/852b903b5e633.pdf
    • https://tuxutumixebapi.weebly.com/uploads/1/3/1/4/131438514/0a8b5f21e.pdf
    • https://xefosujusiro.weebly.com/uploads/1/3/4/0/134042031/mepejudefogazemule.pdf
    • https://zakoponuzu.weebly.com/uploads/1/3/5/9/135992890/6afa29d94.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/0d564125-23f0-42af-93fd-d74d22ca70d3/python_best_book_for_beginners.pdf
    • https://s3.amazonaws.com/mipizaju/informatica_cloud_tutorial_point.pdf
    • https://uploads.strikinglycdn.com/files/4f87aef2-3988-4cef-9b64-41c59962e2ad/la_la_land_cast_name.pdf
    • https://s3.amazonaws.com/fomudebipefasu/97485747979.pdf
    • https://s3.amazonaws.com/nelizenejakarug/esc_dyslipidemia_guidelines_2016.pdf
    • https://s3.amazonaws.com/sukobogixe/accounting_terms_crossword_puzzle_answers_aicpa.pdf
    • https://s3.amazonaws.com/febopa/equivalent_fractions_worksheets_grade_3.pdf
    • https://s3.amazonaws.com/mexavofezoxi/macbeth_act_4_scene_3_modern_translation.pdf
    • https://s3.amazonaws.com/lulelepese/gone_with_the_wind_sequel_summary.pdf
    • https://s3.amazonaws.com/neporezofov/appearance_and_personality_exercises.pdf
    • https://s3.amazonaws.com/tapelu/sabopebipob.pdf
    • https://s3.amazonaws.com/jolozidabi/waxaxegowutajuguvosev.pdf
    • https://s3.amazonaws.com/bidivo/money_laundering_sentencing_guidelines_2014.pdf
    • https://s3.amazonaws.com/wujodibu/line_6_floor_pod_multi_effect_processor.pdf
    • https://s3.amazonaws.com/wunojipu/game_bakugan_battle_brawlers_pcsx2.pdf
    • https://s3.amazonaws.com/zarevizebi/puwekijibirutenejaxar.pdf
    • https://s3.amazonaws.com/wupuxus/sasajixazo.pdf
    • https://s3.amazonaws.com/pegozegi/expanding_difference_of_two_squares_worksheet.pdf
    • https://uploads.strikinglycdn.com/files/5b91cfb3-f228-4ac5-ba19-0a1fc2610f6e/vans_old_skool_black_and_white_womens_size_7.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011f66.bin
0066903b2326e9a0f03c8e50efc27c764fd9d40b5bce69c6609f9e3ebc4c88ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11F66 5184 bytes
font_01_sfnt_off000130f0.bin
51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x130F0 1800 bytes
font_02_sfnt_off0001397e.bin
9c32ffaf227b05c1a83716ff37e3a7d10580dc734d5c36d261ef24ae1e76ccf5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1397E 10964 bytes
font_03_sfnt_off00015f09.bin
bf8f9ece8d9d74ce2d7a98a07ee1bb8f4056faf702b3b1702118181e85f1b939		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15F09 16312 bytes

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