Malicious PDF — malware analysis report

Static analysis result for SHA-256 de75f0106c716132…

MALICIOUS

PDF

69.9 KB Created: 2021-01-13 17:35:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 9e7457018f97da4e2bb8c593eb7631cb SHA-1: 7e19fe025ca4c6ad71892be52ccf2ed7298ea0b7 SHA-256: de75f0106c71613227266e0a8a48de638bb8018c1a6f50276a6608c88276066b
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a 'link farm', suggesting a malicious intent to redirect users. The ClamAV detection and ML classifier strongly indicate malicious content, specifically a phishing or trojan variant. While no scripts were directly extracted, the PDF structure and embedded URLs point towards a phishing or SEO manipulation attack.

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://traffnew.ru/aws?utm_term=java+string+format+int+leading+zeros PDF link annotation
    • https://cdn.sqhk.co/vagewovupug/hjhLjgO/best_weather_apps_for_android_home_screen.pdfIn PDF document text
    • https://nipobajomofak.weebly.com/uploads/1/3/4/6/134641158/sebixowasa.pdfIn PDF document text
    • https://wubinuju.weebly.com/uploads/1/3/4/6/134642725/dapuvurikedusaso.pdfIn PDF document text
    • https://cdn.sqhk.co/mofosalamo/Dw8FicF/viking_vmod5240ss_microwave.pdfIn PDF document text
    • https://cdn.sqhk.co/jenotonolo/lfGPngd/fist_of_fury.pdfIn PDF document text
    • https://putigazabikikim.weebly.com/uploads/1/3/2/6/132682718/51489.pdfIn PDF document text
    • https://gixisisopovi.weebly.com/uploads/1/3/4/7/134713576/2293198.pdfIn PDF document text
    • https://cdn.sqhk.co/rilowikapaz/jcjijbg/cat_wars_lion_vs_cheetah.pdfIn PDF document text
    • https://dudikojegak.weebly.com/uploads/1/3/1/4/131406444/lagewofuvugobuniz.pdfIn PDF document text
    • https://jolaxedepodoz.weebly.com/uploads/1/3/4/7/134708869/rinovugigikox.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/belopudevuzuza/badlapur_full_movie_free_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/mesixadelomomo/toy_boats_place.pdfIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/60306656310.pdfIn PDF document text
    • https://s3.amazonaws.com/bikikanafopavu/xudivok.pdfIn PDF document text
    • https://s3.amazonaws.com/xakajoziwibi/fivavovokevixikakizizuram.pdfIn PDF document text
    • https://s3.amazonaws.com/tudawufed/valiant_hearts_apk_full_espaol_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/xanunafojuloki/zunenexiku.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_off0000d0ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0AC 5328 bytes
SHA-256: 5de322fe6626127a5dfa353d3b40b0f695575b8b57771fe1d3a53d492b89e021
font_01_sfnt_off0000e2c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2C7 11572 bytes
SHA-256: 265c793ca4649eca6cea81a0326455e8902f79c497da3907329989caf74f60b3

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