Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8131a2f0b7cbf9d…

MALICIOUS

PDF

69.5 KB Created: 2020-12-18 03:34:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 7fef59b759171610d062c34ef1af1d04 SHA-1: aa68f01ac6998b991cabe1023be66c7b025bec61 SHA-256: f8131a2f0b7cbf9dca18cf618a4bbc50beadbd9599ebb61f9c063421ff9255da
244 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many hosted on disposable domains, indicating a link farm designed to redirect users to malicious content. The presence of a link to 'traffking.ru' further suggests a redirection to potentially harmful sites. ClamAV and ML classifiers confirm the malicious nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://traffking.ru/aws?utm_term=sample+of+corrective+and+preventive+action+report In PDF document text
    • https://sojofemek.weebly.com/uploads/1/3/4/3/134310133/cc563f.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/wotareropajewub.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387037/normal_5fc50479637d3.pdfIn PDF document text
    • https://varipejat.weebly.com/uploads/1/3/0/7/130739080/rewininakov_gideb.pdfIn PDF document text
    • https://gokopawe.weebly.com/uploads/1/3/4/4/134493337/b94e1a.pdfIn PDF document text
    • https://kiriwalukejogof.weebly.com/uploads/1/3/4/3/134310578/xesepozabo_kinag_kezupezovunu.pdfIn PDF document text
    • https://fagugirawax.weebly.com/uploads/1/3/4/3/134388021/ee31163c2c59dbe.pdfIn PDF document text
    • https://senobatupubem.weebly.com/uploads/1/3/1/4/131437889/jonekeganije_kaguraxepezorab.pdfIn PDF document text
    • https://nosisakapu.weebly.com/uploads/1/3/4/7/134773138/6607289.pdfIn PDF document text
    • https://xuberirerumona.weebly.com/uploads/1/3/4/5/134586272/nafetuse_xufigipokejogun.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417656/normal_5f99fb888344b.pdfIn PDF document text
    • https://zusiwugebibod.weebly.com/uploads/1/3/4/4/134484471/winad-nepovufivog-pafadunezej-bewuduri.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/baf88b8a-e911-4078-bbaf-e4b749f0697a/bol_na_mahi_bol_na_mp3_song_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b133587e-c1a8-40c7-8704-748f158ddb9b/65895265742.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d2172f8-c643-498b-8240-d229fe425ef6/39802169802.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d31d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD31D 5284 bytes
SHA-256: 2d959459e3defa8af2849dab487b15a726389e06ffff97d732cd04c4ebd764d8
font_01_sfnt_off0000e50c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE50C 10476 bytes
SHA-256: 33b7d195de31122e202765d4c428511b3ed708f2bbd58c941686aa41df0cbf11

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