Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b95d1a5c17f61fe…

MALICIOUS

PDF

78.8 KB Created: 2021-04-02 13:19:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aa02171833786fd9f085fb9ad5a0b5fd SHA-1: 48b21f5f714be215457ca5c0d90d45953c6f1846 SHA-256: 1b95d1a5c17f61feccbfa8500700d3df97476be1da6e8f5a96492b99d333c84f
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a primary focus on 'https://lozipotod.ru/award?keyword=galaxia+definicion+pdf'. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting a link farm or SEO manipulation tactic. ClamAV detection and ML classification further support its malicious nature, likely for phishing or scam purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8858

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://lozipotod.ru/award?keyword=galaxia+definicion+pdf
    • https://teseresoj.weebly.com/uploads/1/3/4/6/134644138/31e5fbb5.pdf
    • https://nuzalegexokoz.weebly.com/uploads/1/3/0/8/130814177/1993491.pdf
    • https://takotifisusa.weebly.com/uploads/1/3/4/4/134499816/7456959.pdf
    • http://suvuxivenorum.mypressonline.com/alpha_male_strategies_book_free.pdf
    • https://ruloxewetufo.weebly.com/uploads/1/3/1/1/131164393/1629362.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/lizuseguwix/34721972146.pdf
    • https://s3.amazonaws.com/bulalowisu/xawegalotojizal.pdf
    • https://s3.amazonaws.com/wajufifenoxuj/texoxomutopiloxari.pdf
    • https://s3.amazonaws.com/zoromexemuzid/desh_bhakti_instrumental_ringtone_pagalworld.pdf
    • https://s3.amazonaws.com/kesumasaka/highway_star_organ_solo_sheet_music.pdf
    • http://tufopabapud.rf.gd/cat_on_a_hot_tin_roof.pdf
    • https://uploads.strikinglycdn.com/files/9e5395cc-f68e-4c50-9238-b18b637ecc5c/a_history_of_western_society_volume_2.pdf
    • http://gurabagoderes.atwebpages.com/soweludotaluvidugirul.pdf
    • https://uploads.strikinglycdn.com/files/825b8dee-1f0a-45b7-893b-6f9b327a3a52/lyman_powder_scale_pan.pdf
    • https://s3.amazonaws.com/nuruvapozixix/58907211075.pdf
    • https://uploads.strikinglycdn.com/files/df9f1eae-e822-4214-a708-7544acf2ac72/how_do_you_write_a_running_record.pdf
    • https://s3.amazonaws.com/kopisigapub/85222130405.pdf
    • https://s3.amazonaws.com/somamere/25982185830.pdf
    • https://s3.amazonaws.com/penale/3d_scanner_pro_free.pdf
    • http://repafow.epizy.com/trumpet_articulation_exercises.pdf
    • https://uploads.strikinglycdn.com/files/34a9f0c3-f0d4-4c19-ac6a-8ec8cd34ffa7/what_is_seven_devils_near.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f49f.bin
960f59ae2d7a2e63e5733d2fd93e7e54dd4a55efc8abb735fb5f7118e7c1f5d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF49F 4684 bytes
font_01_sfnt_off0001049b.bin
692fb34833c994fa849871b7aa40a604d2b9dee455f998f47dbbfe6202822756		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1049B 11988 bytes
font_02_sfnt_off00012b7f.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12B7F 4324 bytes

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