Malicious PDF — malware analysis report

Static analysis result for SHA-256 d315cae12cf2e7c8…

MALICIOUS

PDF

65.5 KB Created: 2020-12-05 13:31:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fbc05d9850cd1da58846d28dbef03d7d SHA-1: ba21743fe97ff0573fa904f18c791ac51769b589 SHA-256: d315cae12cf2e7c8fd82d06a56fc587e5495ef163e2df862bbdff1dc64b7ddbe
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ggtraff.ru/aws?utm_term=cid+video+format'. ML classification and ClamAV also flagged this file as malicious. The document body, though heavily obfuscated, suggests a lure related to 'Cid video format', which, combined with the malicious URL, indicates a phishing or malware delivery attempt.

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ggtraff.ru/aws?utm_term=cid+video+format
    • https://rofovotojoroko.weebly.com/uploads/1/3/4/8/134878837/d7c97e31.pdf
    • https://dolojimopa.weebly.com/uploads/1/3/4/8/134887070/nozofezune.pdf
    • https://fevijalefo.weebly.com/uploads/1/3/4/3/134383315/4fa845c26af.pdf
    • https://fazulozuxili.weebly.com/uploads/1/3/4/6/134625369/fdf8472b2.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static1.squarespace.com/static/5fc173ecdf132613bbc1a931/t/5fc5ab04f3de5e49b5290664/1606789892880/90651336765.pdf
    • https://s3.amazonaws.com/sirilagewuga/11307209546.pdf
    • https://uploads.strikinglycdn.com/files/0c4c1d9f-962f-424f-89d4-50f02311c92a/26787729312.pdf
    • https://s3.amazonaws.com/xokebore/standard_ball_bearing_sizes.pdf
    • https://uploads.strikinglycdn.com/files/76658012-1353-44c9-88c8-4335e6cd4f8b/motenuvufovejixujedijete.pdf
    • https://uploads.strikinglycdn.com/files/d8c264f4-19a2-4667-822a-c257eb2572dd/centennial_high_school_baseball_boise.pdf
    • https://uploads.strikinglycdn.com/files/2d72dccc-eed4-4559-be3b-8849f34829f7/buzukeratifuvavazeb.pdf
    • https://s3.amazonaws.com/memobofilenabon/fictional_narrative_template.pdf
    • https://static1.squarespace.com/static/5fc112c117e7202640eb3140/t/5fc405de6457125654b8fd02/1606682079463/samsung_sch_u640_manual.pdf
    • https://s3.amazonaws.com/wapabefizosumi/bestwap_sad_song_2019.pdf
    • https://uploads.strikinglycdn.com/files/b44d2d1d-e4a1-4b5a-a807-980a649c96ca/futitek.pdf
    • https://s3.amazonaws.com/vavabi/toxicity_definition.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c7eb.bin
e221086401590eb035a0f5006081f9b94c7695dd20bf7581444bbfb48437ad54
pdf-font-stream PDF embedded font (sfnt) at offset 0xC7EB 4808 bytes
font_01_sfnt_off0000d82b.bin
62bda46de748312b08d2d9c7adcfdf7381a8daed5229efba2694fdefa5bcfdba
pdf-font-stream PDF embedded font (sfnt) at offset 0xD82B 9660 bytes