Malicious PDF — malware analysis report

Static analysis result for SHA-256 3da34b0acab8cc4b…

MALICIOUS

PDF

79.3 KB Created: 2021-03-20 18:32:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 20b479c91ab3b7e6d03f545fe5ea4b6a SHA-1: 25c66f34a041ab3bb7b3b3744b6effb38558cf2f SHA-256: 3da34b0acab8cc4b4f49d34e0094af0da6deaf5435a94843272d10dc9da4990e
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for SEO link farms and phishing campaigns. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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=content+marketing+ebook+pdf PDF link annotation
    • https://biramufon.weebly.com/uploads/1/3/4/7/134775887/8883775.pdfIn PDF document text
    • http://libralab.digital/58374262684miqpw.pdfIn PDF document text
    • https://lonapumerupa.weebly.com/uploads/1/3/4/8/134853684/fubazugafogezuvoba.pdfIn PDF document text
    • http://alex-chekalev.com/an_organizations_information_technology_project_selection_process_should_guide_the_strategic_plan4udxg.pdfIn PDF document text
    • https://mivagadak.weebly.com/uploads/1/3/4/5/134599435/8075230.pdfIn PDF document text
    • https://mosejibufo.weebly.com/uploads/1/3/4/4/134437632/6650486.pdfIn PDF document text
    • https://jamiwimavebu.weebly.com/uploads/1/3/1/4/131453695/9537452.pdfIn PDF document text
    • https://zazibarem.weebly.com/uploads/1/3/0/7/130775746/pisogev.pdfIn PDF document text
    • https://tipiwaterexiw.weebly.com/uploads/1/3/3/9/133997214/kotipoleroxetut_vuponenifasubej_tedirukid_sesuke.pdfIn PDF document text
    • https://dekilaroturiti.weebly.com/uploads/1/3/1/8/131856809/kugenudubebino_vozuresigi_witipazukak_bukatim.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/3f4cc7a8-2bd8-4220-98d9-31a67d4b7baf/bridge_cheat_sheet_for_beginners.pdfIn PDF document text
    • https://s3.amazonaws.com/fajonubinomeder/metaphorical_code_switching.pdfIn PDF document text
    • https://s3.amazonaws.com/vapite/bleacher_report_nfl_week_16_score_predictions.pdfIn PDF document text
    • https://s3.amazonaws.com/sejakopa/pobelulaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ace53a9c-9d87-4121-92e2-dd8b82bee95a/50455377737.pdfIn PDF document text
    • https://s3.amazonaws.com/watajive/18604668148.pdfIn PDF document text
    • https://s3.amazonaws.com/fajujiju/nizedutimolite.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/659ad58a-3649-469c-828b-7f2a1e4c2e1b/46631535809.pdfIn PDF document text
    • https://s3.amazonaws.com/gapuruxumeg/9273433524.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07fe8d35-c3db-4a9e-9caa-1b393fc8a38e/pazapegoramalanazew.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_off0000f7b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7B0 5260 bytes
SHA-256: d4f6190fc77e96334f4531a0648c9f72dff660e90a181ee8399f616221a8c114
font_01_sfnt_off00010971.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10971 10864 bytes
SHA-256: b4957f7fba1b472efcc3639447c9e6dfe221c9813bd454ffb309a6d71ce0be90

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