Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ab964a9e3079175…

MALICIOUS

PDF

69.9 KB Created: 2021-01-13 14:57:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: ba591f8f133c425af3819e92a2ef8e42 SHA-1: 9f4d924ef318175a0125f0792b161b5876c3b643 SHA-256: 9ab964a9e30791757dcb5a5fac92acea90a40d555637f8088e4ea585bd57faae
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to suspicious domains and are flagged as part of a link farm. One critical heuristic indicates a link to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware via the linked sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffmen.ru/aws?utm_term=exponents+and+square+roots+worksheet In PDF document text
    • https://lukogazusewof.weebly.com/uploads/1/3/4/6/134643336/6322527.pdfIn PDF document text
    • https://site-1249586.mozfiles.com/files/1249586/marodivajowajevuje.pdfIn PDF document text
    • https://site-1176940.mozfiles.com/files/1176940/53236985174.pdfIn PDF document text
    • https://site-1177224.mozfiles.com/files/1177224/bogijat.pdfIn PDF document text
    • https://site-1176106.mozfiles.com/files/1176106/learn_spanish_language_listen_speak_reads.pdfIn PDF document text
    • https://site-1178370.mozfiles.com/files/1178370/booyah_pad_crasher_frogs.pdfIn PDF document text
    • https://site-1168108.mozfiles.com/files/1168108/71236512434.pdfIn PDF document text
    • https://site-1228990.mozfiles.com/files/1228990/beyonce_mtv_single_ladies_performance.pdfIn PDF document text
    • https://cdn.sqhk.co/zazavoxujub/ghPRJVO/89922923106.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/xulepiwa/sukojupe.pdfIn PDF document text
    • https://s3.amazonaws.com/rawesaragegugar/wusovejezaxasunuwa.pdfIn PDF document text
    • https://s3.amazonaws.com/dojonuta/12521053228.pdfIn PDF document text
    • https://s3.amazonaws.com/bizamesuwepe/20041529239.pdfIn PDF document text
    • https://s3.amazonaws.com/tarizirefevifab/xemefu.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_off0000d2cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2CC 5324 bytes
SHA-256: 7665d084a2aea8816a48274b541887cb5a0016d23c6347572768d3e6e45bf3f4
font_01_sfnt_off0000e4f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4F6 10528 bytes
SHA-256: 43da66bf3d5bbbc0b53f2e46335f6e43c6bb2cb7ef2bd066a3341a9e35fb3fa2

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