Malicious PDF — malware analysis report

Static analysis result for SHA-256 f82da13fc493379b…

MALICIOUS

PDF

94.1 KB Created: 2021-05-04 02:19:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: f4fb38b0c6bee87fa530c1f23b464c43 SHA-1: 252d964e7d5e52d9f3ea3c81c093aec670ca986c SHA-256: f82da13fc493379bd491b7944dd2e7c4661da00c9dbe7436fad0bc3c5b8aba8f
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many of which are obfuscated or lead to potentially malicious content, suggesting a link farm or phishing attempt. The embedded URL 'https://leonvi.ru/strik?utm_term=hearts+of+iron+3+cheats' is the primary indicator of the phishing lure, disguised as game cheats.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://leonvi.ru/strik?utm_term=hearts+of+iron+3+cheats PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4410674/normal_6020a3a9c04c5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377674/normal_5fe1f77c3687e.pdfIn PDF document text
    • https://suxugugufagiwa.weebly.com/uploads/1/3/4/7/134740592/lulavofukuvufove.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468812/normal_6046239875187.pdfIn PDF document text
    • https://wepovibixig.weebly.com/uploads/1/3/4/0/134040587/wubojizavelanolok.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387232/normal_6033b1d56c214.pdfIn PDF document text
    • https://nozijuga.weebly.com/uploads/1/3/4/6/134698325/sorobo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zaxawetawupo/fonubibofa.pdfIn PDF document text
    • https://s3.amazonaws.com/wezukep/496793162.pdfIn PDF document text
    • https://6d4cd3b7-91e9-43ac-92b9-205473f1e50d.filesusr.com/ugd/28146e_c80b75ab47d345c48b2e797544fafc59.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fogibi/xedowaz.pdfIn PDF document text
    • https://45dcde1a-aed5-4138-b95e-a0f768a283bf.filesusr.com/ugd/89441e_c9880925702640d8bc3f79fb0cd94842.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vuliwisuwig/dojeguzidakiwidawijuwem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a078cdc7-bb1f-4842-a4e4-ebd33ec0440f/bizipepuxumipef.pdfIn PDF document text
    • https://9b08d158-0e0f-4203-9b31-e1272d977b1c.filesusr.com/ugd/086daf_ff8aef213ec44ce1bedea2b1756bedf6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/girilifawuxi/74438001224.pdfIn PDF document text
    • https://s3.amazonaws.com/nuruvapozixix/will_tesla_prices_go_down_in_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/jukezeluf/kopixavanotatipidu.pdfIn PDF document text
    • https://s3.amazonaws.com/julaxel/91858833934.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef57a25c-b442-467f-9ab8-e41fc79cb35a/what_are_the_types_of_inferential_statistics.pdfIn PDF document text
    • https://6f46ab72-b8e3-4ec2-8f01-cb5d6491dab7.filesusr.com/ugd/9a120b_88ee8dab96f742ac809d65a74d17c02d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2756e838-d7ec-421d-95e1-a1b50fa07b23/wireless_headphones_compatible_with_cisco_phones.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4eb4e63b-ec1f-49f3-915e-5ad4c8310cb7/emp_slot_jammer_schematics.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010bd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BD3 4356 bytes
SHA-256: bb171a12403b1554c1f757c58bf51866ef15cc688a69df3beaef9215b63cfea9
font_01_sfnt_off00011b4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B4C 5060 bytes
SHA-256: 3e1206afa6ce7e300c8c4960b819af0e1c6c4b7df21b23d14179ca44e91f5014
font_02_sfnt_off00012c79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C79 12240 bytes
SHA-256: 2a420e6635370e7698c52adcdeeb2b85d855569d4af4ea95d8f7c68a5971c959
font_03_sfnt_off000155f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x155F8 16060 bytes
SHA-256: 99ddc6f5858eb134f8024171ebe717cbd02485c31471b921a5021903b5272953