Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9712f5b59f0b553…

MALICIOUS

PDF

70.8 KB Created: 2020-11-25 16:12:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 768afb1c17dfb9b4e3cb94b530bcada6 SHA-1: 856d08718811fed5c5a39d1077bd1755e6188169 SHA-256: d9712f5b59f0b553793062c2cd16cbbc71ea82b4f45f3ec790e6d1be3c0023d7
214 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, including a known malicious redirector at 'ggtraff.ru'. The document body, though partially garbled, suggests a lure related to a 'personality test', aligning with phishing or social engineering tactics. The presence of multiple PDF links and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ggtraff.ru/strik?utm_term=16+personality+test+questions+and+answers+pdf In PDF document text
    • https://fafugugopogewip.weebly.com/uploads/1/3/4/4/134464831/rapejov_ziloze_folutabete.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab489989-2799-4c72-85d8-3a68314085c7/fablehaven_book_3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/562deae8-9f1a-43f3-a551-28bb1b0f970a/1126646150.pdfIn PDF document text
    • https://s3.amazonaws.com/xasovewipeje/koxebajedanakima.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/994c0abe-b2d5-4f8c-b1d7-a7b24a30d343/white_stained_glass_pane_minecraft_id.pdfIn PDF document text
    • https://s3.amazonaws.com/vexeliku/xiwobirofujigimulorage.pdfIn PDF document text
    • https://s3.amazonaws.com/wupiwupiwot/paradise_lost_book_4_text.pdfIn PDF document text
    • https://s3.amazonaws.com/panalipolifod/ligasigiwopa.pdfIn PDF document text
    • https://s3.amazonaws.com/fowikorejodi/acrylamide_in_food.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7fdebaf-7f8d-49b9-8a4c-0750cb7804fa/patofisiologi_asma_bronkial.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89cc5700-fd3c-4d88-97f6-ea79e3a3256e/septic_joint_icd_10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d8ad4e5-1463-41a0-b59b-b8b6e90bee4a/rixerukediz.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_off0000d6f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6F8 5464 bytes
SHA-256: 3def6aec567851936ee36369915c9b08418f36f187e52fba7723232b74ac1884
font_01_sfnt_off0000e9b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9B3 10664 bytes
SHA-256: cd72f235163525d9c73128e3c512a7823f537bee0e9ceba5d2b42457eb0ee001

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