Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ae7426904b55e09…

MALICIOUS

PDF

134.4 KB Created: 2021-01-01 06:46:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 0ff9cf3a257580d0fcf2fb701da7ad25 SHA-1: 6e85430f69884acfc6e006ffe5460f15c9a55fe1 SHA-256: 0ae7426904b55e09f43d85f38840d84ee51e9a398f3ab2ee14a9f2b9a5c15681
214 Risk Score

Malware Insights

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

This PDF file was flagged by multiple critical heuristics, including ClamAV and an ML classifier, indicating malicious content. It contains a link farm pointing to external PDFs, with one URL leading to known malicious redirector infrastructure. The presence of embedded URLs and the overall structure suggest an attempt to lead the user to malicious sites, likely for phishing or further malware delivery.

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://traffine.ru/123?utm_term=math+is+no+burden+too+heavy In PDF document text
    • https://cdn-cms.f-static.net/uploads/4379844/normal_5f8c00a03f329.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367283/normal_5f9c1b95eac71.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371787/normal_5f88791448c0e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393483/normal_5fb540bde5b88.pdfIn PDF document text
    • https://mutabitobivu.weebly.com/uploads/1/3/4/6/134636436/wedozulowofexedu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410722/normal_5fba0860d7e21.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409798/normal_5faa1057572c6.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/wudibirewuduto/steam_api._dll_pes_2017_32_bit.pdfIn PDF document text
    • https://s3.amazonaws.com/wajibile/47209323838.pdfIn PDF document text
    • https://s3.amazonaws.com/baritexovopa/40839482324.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b76f8225-64af-401b-8c4f-9a6a1e7bb447/bikejagoroguw.pdfIn PDF document text
    • https://s3.amazonaws.com/gonima/bloons_td_5_mac.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e849939f-57cd-48f7-a939-9b687aec4221/amd_ati_4800_drivers.pdfIn PDF document text
    • https://s3.amazonaws.com/fefurorobumi/puff_apk_android.pdfIn PDF document text
    • https://s3.amazonaws.com/semuxemakaw/zunarejipafidaxujop.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_off0001b801.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B801 5188 bytes
SHA-256: 9505989c365304f1ff7add3f354c823a5de349a681d6600bb2c753ce4d567850
font_01_sfnt_off0001c9b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C9B1 14388 bytes
SHA-256: 8ef1d3ae0d939769e62ba276d8718fa10ca9b2eacbbfde69a2613a660a34aa28
font_02_sfnt_off0001f766.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F766 16060 bytes
SHA-256: 8f676b3be356e2086f34f7c81dd3575184be90372cbe0b4aaba7ba30be3377d2

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