Malicious PDF — malware analysis report

Static analysis result for SHA-256 c12e2e03d6251322…

MALICIOUS

PDF

71.2 KB Created: 2020-12-05 14:06:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b907cc2b16a2667e1556cf61d9543ca5 SHA-1: dbe06bf2f5b3525fa405e42b10657e60e7ea290f SHA-256: c12e2e03d6251322891d435bb72d0c0d8240446a6d18e4d23b293eeac8bf8359
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure, specifically pointing to 'https://cctraff.ru/aws?utm_term=almost+a+hero+apk'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the embedded URL is the primary indicator of malicious intent, likely serving as a lure for phishing or to download a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://cctraff.ru/aws?utm_term=almost+a+hero+apk
    • https://cdn-cms.f-static.net/uploads/4466165/normal_5fa57e7422ae1.pdf
    • https://static.s123-cdn-static.com/uploads/4453105/normal_5fc9c9a12bfb9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/e2759d92-bb08-4d8b-aaa5-744bb3524a78/dawijavopapa.pdf
    • https://static1.squarespace.com/static/5fc4cc83239b0722914a2f70/t/5fc82384f97c193540e3e1e0/1606951812960/62457180144.pdf
    • https://s3.amazonaws.com/xukonakefules/beyond_bilingualism_multilingualism_and_multilingual_education.pdf
    • https://uploads.strikinglycdn.com/files/7516c931-9641-45b7-90dd-b0c1f7e7a69f/2_way_switch_wiring_diagram.pdf
    • https://uploads.strikinglycdn.com/files/d07d797a-ad94-4b9f-861c-93112b03584b/stem_logo_png.pdf
    • https://uploads.strikinglycdn.com/files/91e48462-978c-43f7-b693-91caab567f4c/25862296458.pdf
    • https://uploads.strikinglycdn.com/files/c3c40926-3ffb-4065-8bf7-93fef321b0df/privileged_access_management_gartner.pdf
    • https://s3.amazonaws.com/naxizugenabi/1855807751.pdf
    • https://static1.squarespace.com/static/5fc36a1c3dfdd95b60e51b81/t/5fc4acd9145a8629dc44bcc2/1606724832541/debogisuwejolozasawo.pdf
    • https://s3.amazonaws.com/mamibis/23559197314.pdf
    • https://uploads.strikinglycdn.com/files/6a83c625-68f6-4ae7-ae84-c685625f6cfe/guitar_finger_picks_guitar_center.pdf
    • https://s3.amazonaws.com/sefukirexuwekij/34175521591.pdf
    • https://s3.amazonaws.com/bopuxosavubare/gm_truck_build_sheet.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c418.bin
5b03cafdeeee9cdf555c8b42135690738051744868f8982642fdc2c14296bc5c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC418 5112 bytes
font_01_sfnt_off0000d54a.bin
6e1866df899019087f70de7b892ad7a19593250a8b2f81b81a257e8b1483a88b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD54A 11100 bytes
font_02_sfnt_off0000fb03.bin
12bdfdd26b42687ed6d6e4673084773943fc64d80ea302008a05158b1f99f3df		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB03 16068 bytes

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