Malicious PDF — malware analysis report

Static analysis result for SHA-256 acbaf5636014ffc3…

MALICIOUS

PDF

73.1 KB Created: 2021-01-24 02:02:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 6a4853ef5108d58c40f243d9df7bf74b SHA-1: d4ef28558719a61ce3a5490590a78253f5deea32 SHA-256: acbaf5636014ffc329306fe64f7e7681c1a3892d2d5d1a0204a380fab68dc3f2
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, specifically as a phishing or trojan distribution attempt. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or redirection scheme. The embedded URLs and the ClamAV detection indicate a malicious intent to redirect users to potentially harmful content.

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
  • 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://baarspo.ru/aws?utm_term=email+outlook+templates+free PDF link annotation
    • https://fanamixaxa.weebly.com/uploads/1/3/4/0/134017579/2977353.pdfIn PDF document text
    • http://kewisanoxiv.66ghz.com/89539798398.pdfIn PDF document text
    • https://vigenawora.weebly.com/uploads/1/3/4/4/134495248/5798182.pdfIn PDF document text
    • https://fudewuwadume.weebly.com/uploads/1/3/0/7/130740250/4345958.pdfIn PDF document text
    • https://voxudipuxun.weebly.com/uploads/1/3/5/3/135319737/9095813.pdfIn PDF document text
    • https://fafefojesuvun.weebly.com/uploads/1/3/4/6/134651362/wogipasuj.pdfIn PDF document text
    • https://gijopufiri.weebly.com/uploads/1/3/1/3/131384250/16a950.pdfIn PDF document text
    • https://zixokamewi.weebly.com/uploads/1/3/4/3/134386319/jepeloz.pdfIn PDF document text
    • https://likizosuzi.weebly.com/uploads/1/3/4/8/134886942/3058463.pdfIn PDF document text
    • https://xoritiluvugabem.weebly.com/uploads/1/3/2/6/132695829/gekifexefi_nezunilamozuda.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bijamujijupife.epizy.com/23587803287.pdfIn PDF document text
    • http://janalusexisowa.epizy.com/zonisamide_medication_guide.pdfIn PDF document text
    • http://fezivepe.rf.gd/arere_ekkada_ekkada_mp4_song.pdfIn PDF document text
    • http://pudubekij.epizy.com/gmail_api_example_android.pdfIn PDF document text
    • http://gulavofi.epizy.com/char_broil_big_easy_owners_manual.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_off0000e17e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE17E 5068 bytes
SHA-256: a19f10b488ae434fc0077843a9c8a23ca15ae9649bda55f5b5776b99088ec61d
font_01_sfnt_off0000f2a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2A6 10680 bytes
SHA-256: 231c08bcdecb5be28343b05dc8f182058105504f52115b8c7e82747ccbc280b1

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