Malicious PDF — malware analysis report

Static analysis result for SHA-256 52d6530ff944d338…

MALICIOUS

PDF

63.3 KB Created: 2020-11-23 12:23:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cd43dbad9ac67d22426367ec91a1c70a SHA-1: 142b2d34c13a3fafac0f2200ea9a0bf13c5da233 SHA-256: 52d6530ff944d338d6bf7b2ae67ab08c8552f6f16c5a68a4ce4c32c32a800e53
214 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'https://ggtraff.ru/123?utm_term=will+come+in+spanish'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, one of which points to 'https://s3.amazonaws.com/risisipajole/abject_art_repulsion_and_desire_in_american_art.pdf'. The ML classifier and ClamAV also flagged this PDF as malicious, indicating a high likelihood of phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://ggtraff.ru/123?utm_term=will+come+in+spanish
    • https://puxolulif.weebly.com/uploads/1/3/4/3/134356270/piberofesefulijijaf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/risisipajole/abject_art_repulsion_and_desire_in_american_art.pdf
    • https://s3.amazonaws.com/busutafitufe/96830421474.pdf
    • https://uploads.strikinglycdn.com/files/0dd112f0-b828-4aa1-9c86-8b0185dba14f/star_wars_poster_a_new_hope.pdf
    • https://uploads.strikinglycdn.com/files/9d2f06d7-ee0c-408f-b26a-d89db536f63e/fudaziwufezusozepipi.pdf
    • https://s3.amazonaws.com/minegikukovel/anemia_de_celulas_falciforme_pediatria.pdf
    • https://s3.amazonaws.com/vokeri/nasopaz.pdf
    • https://s3.amazonaws.com/mibiwivanetuj/giuseppe_conte_cv.pdf
    • https://s3.amazonaws.com/ladojenefe/15894061450.pdf
    • https://s3.amazonaws.com/kisimujuk/command_line_check_android_sdk_version.pdf
    • https://uploads.strikinglycdn.com/files/33735cc4-37ae-4a74-85af-39851c5a5349/fatorug.pdf
    • https://s3.amazonaws.com/vogubivajavofu/acc_aha_guidelines_atrial_fibrillation_ppt.pdf
    • https://s3.amazonaws.com/dazifozixawus/film_chillerama_sub_indonesia.pdf
    • https://s3.amazonaws.com/tadovu/nugevonuves.pdf
    • https://s3.amazonaws.com/zatazewoz/lanoline_manuka_honey_firming_serum.pdf
    • https://s3.amazonaws.com/wapabefizosumi/game_loop_emulator.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_off0000bbf5.bin
e9002c6658d54c4e63c8c12f88ee140249233d4fa3671ecc25fa767370a4889d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBBF5 5088 bytes
font_01_sfnt_off0000cd2a.bin
d533ad6b875a727d3ca4fe0a69486b12c3b76f19fc12b60038d5d8d87e9046b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCD2A 10420 bytes

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