Malicious PDF — malware analysis report

Static analysis result for SHA-256 715ca89ec3e5c738…

MALICIOUS

PDF

78.8 KB Created: 2021-03-21 03:15:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 24ec70302721540e11ebe89729347c7d SHA-1: b52b62b87d13482448c21988358bd31f91642641 SHA-256: 715ca89ec3e5c738cc5527e90b3482e13391186132a7e3e5a86740ecdb01a109
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying a link farm designed to direct users to potentially malicious sites. The primary malicious URL identified, 'https://maypoin.ru/award?keyword=ashirwad+column+pipes+price+list+2020+pdf', is likely part of a phishing or malware distribution scheme. ClamAV detection further supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://maypoin.ru/award?keyword=ashirwad+column+pipes+price+list+2020+pdf
    • https://static.s123-cdn-static.com/uploads/4426060/normal_5fe2e7b835bb8.pdf
    • https://jawonuvanez.weebly.com/uploads/1/3/6/0/136021807/rikofidajodofejuw.pdf
    • https://cdn-cms.f-static.net/uploads/4415974/normal_601047484eee5.pdf
    • https://pojekemo.weebly.com/uploads/1/3/4/4/134469054/803c7.pdf
    • https://wakukaxowemaba.weebly.com/uploads/1/3/5/3/135303752/4094595.pdf
    • https://cdn-cms.f-static.net/uploads/4409409/normal_600de5ca0b7c4.pdf
    • https://static.s123-cdn-static.com/uploads/4494432/normal_5fc9d6f60808f.pdf
    • https://static.s123-cdn-static.com/uploads/4472763/normal_5fe253f7cc3c6.pdf
    • https://cdn-cms.f-static.net/uploads/4455660/normal_5fd63225cb78c.pdf
    • https://pigiburoletu.weebly.com/uploads/1/3/2/6/132695467/zodemenudewajunapak.pdf
    • https://cdn-cms.f-static.net/uploads/4420767/normal_601df4a68bcc0.pdf
    • https://cdn-cms.f-static.net/uploads/4421199/normal_6029929eae492.pdf
    • https://static.s123-cdn-static.com/uploads/4368954/normal_5fe24f0bec623.pdf
    • https://cdn-cms.f-static.net/uploads/4495241/normal_5fd856fa4b0c4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/51905a42-b30c-4c72-8299-c24225503c2f/16663495352.pdf
    • https://8650d040-a33d-467d-a608-6706f181f11b.filesusr.com/ugd/61b8bf_2c1ac6b8d2a446a4809741f15e84449c.pdf?index=true
    • https://uploads.strikinglycdn.com/files/2d611b75-b147-4d74-9752-2ed125c8e0f0/42652956781.pdf
    • https://e668d0bc-6b9c-4787-ac64-5363b724ef62.filesusr.com/ugd/6ec699_bf2bbc0e7b8545a5a264706023bed87f.pdf?index=true
    • https://97783159-ced7-426e-9fbd-60d2bb3342fb.filesusr.com/ugd/00058f_048dd47b09f94a0ba1fb1c5ce6bfce1f.pdf?index=true
    • https://uploads.strikinglycdn.com/files/967acea4-82e8-45cb-b973-60315844f888/how_fast_does_a_cup_of_tea_cool.pdf
    • https://uploads.strikinglycdn.com/files/d11a4d94-19d2-4666-874b-35597086a93c/samsung_appliance_repair_near_me.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_off0000d085.bin
f90f2abe54148441cbac58cb0085b7601afc3da555299db3c82f9170b9e460a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD085 5632 bytes
font_01_sfnt_off0000e38c.bin
2953fe1567e2029bef0d1eb17271bb52f75d9295b659de9050dc41ff96508c0d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE38C 10564 bytes
font_02_sfnt_off000107d6.bin
7f268005b80ff82e89639affb95403f55eddb42516abbde6a76e27226db124cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x107D6 16172 bytes
font_03_sfnt_off00011cf4.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11CF4 4324 bytes

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