Malicious PDF — malware analysis report

Static analysis result for SHA-256 d79b9b63c5c5925a…

MALICIOUS

PDF

75.2 KB Created: 2020-11-10 21:48:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: f1696024d178b87e9e1c1726434cb624 SHA-1: 7ad851f696fdb7511e90c7d07d9c5b7a292625b2 SHA-256: d79b9b63c5c5925ae96f9f744445a9d46726c6a7c82d1c36d0ebd7bb5245cf4a
196 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, many pointing to SEO redirectors, suggesting a link farm or phishing campaign. The primary malicious URL identified is 'https://traffnew.ru/strik?keyword=auglaize+county+auditor+property+search', which is likely used to redirect users to a malicious site. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://traffnew.ru/strik?keyword=auglaize+county+auditor+property+search PDF link annotation
    • https://putigazabikikim.weebly.com/uploads/1/3/2/6/132682718/4c7af57c7d5b9.pdfIn PDF document text
    • https://ziripovopibew.weebly.com/uploads/1/3/0/8/130874468/rimegugipuwofe_femodabovu_reboj_pepozagufupe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nitatotol/sistemas_operativos_moviles_mas_usados.pdfIn PDF document text
    • https://s3.amazonaws.com/padoragog/73252367437.pdfIn PDF document text
    • https://s3.amazonaws.com/mupakijivuruzim/bajebowajusopuvekuda.pdfIn PDF document text
    • https://s3.amazonaws.com/sulasatevirexo/naxugunet.pdfIn PDF document text
    • https://s3.amazonaws.com/midaguvimabof/napulevefitopiwisesamo.pdfIn PDF document text
    • https://s3.amazonaws.com/kudufigunabi/zuforozufoko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e41bf37d-19eb-4747-95af-af196767cc11/fatuvulifomategifula.pdfIn PDF document text
    • https://s3.amazonaws.com/tejuvonixag/fewakadu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7145087f-8a86-4f37-a290-faac76160342/munagederale.pdfIn PDF document text
    • https://s3.amazonaws.com/temujonuwu/desuwunaziwakerimefoxu.pdfIn PDF document text
    • https://s3.amazonaws.com/vovopafubipu/rapikofelamuraleguvugolex.pdfIn PDF document text
    • https://s3.amazonaws.com/betefowubevat/81941948609.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d0bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0BD 5476 bytes
SHA-256: caeb5b97fcbeedfc1a1f6be1b7d0792ec5d4fd83e7ae4ccd170e994643f3026d
font_01_sfnt_off0000e367.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE367 10876 bytes
SHA-256: 7bcb313a2c3fb9bdc6375c5fa0d0eebccbffc784b8baa53e833a0fd7c196341a
font_02_sfnt_off000108c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108C1 16204 bytes
SHA-256: e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15

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