Malicious PDF — malware analysis report

Static analysis result for SHA-256 34c19bab2494eb88…

MALICIOUS

PDF

72.7 KB Created: 2021-02-25 08:51:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 392f92f725b9f336cadbf1fc54d01479 SHA-1: 40b684c747298418ea4d9f9e1ded69e61feb97b0 SHA-256: 34c19bab2494eb88e4f8ac5898d66e62d7d25ec9f977a2efe3cfb479ca3e5dfe
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are hosted on disposable domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though heavily obfuscated, contains text related to 'Amazon prime not 2 day shipping', which is likely a lure to encourage users to click on the embedded malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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://jacksth.ru/123?utm_term=amazon+prime+not+2+day+shipping+2019 PDF link annotation
    • http://kayikciakademi.com/good_luck_chuck_download_300mbftt25.pdfIn PDF document text
    • http://rezotu.xyz/laxudeneviturencu2z.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485926/normal_60373f371389f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482671/normal_6029f97f9599b.pdfIn PDF document text
    • http://kawlites.online/motumelitifinifodetegoz9bff1.pdfIn PDF document text
    • http://housefashion.ru/kuxamumovakumeleniwuporonlfd6p.pdfIn PDF document text
    • https://valuzobuxile.weebly.com/uploads/1/3/2/7/132711949/1502983.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486775/normal_603310e4c3623.pdfIn PDF document text
    • http://nageramuvepom.mywebcommunity.org/66924318804.pdfIn PDF document text
    • http://sakulog.sportsontheweb.net/what_did_the_government_do_to_help_the_great_depression.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501028/normal_602c3ab745d25.pdfIn PDF document text
    • http://playmarket-online.com/quimica_inorganica_acidosomplw.pdfIn PDF document text
    • http://belplitka.ru/what_is_the_best_trigger_weight_for_hunting4mj73.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000de4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE4F 5964 bytes
SHA-256: f6e9545034fcb2916c1a29dd6f6aa7663b621206403d89f47df4d9304148f84c
font_01_sfnt_off0000f27d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF27D 10416 bytes
SHA-256: 41e05412817b53cd1f6bdf884d2c7e666ee811855ce3eea66af8e7dca9a4f03a

Open this report in the interactive analyzer, or submit your own file for analysis.