Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad70f82583928edc…

MALICIOUS

PDF

76.4 KB Created: 2020-12-26 01:50:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 9440430950c4b462d5f7393b8a8ce5d2 SHA-1: 1dcca2b5a07452a77ef9a1966670470171432c17 SHA-256: ad70f82583928edcb1b3e405204d9ac023ef0e24ce315d185d4f68aa041297fa
222 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical finding for a link to known malicious redirector infrastructure. The document contains a large number of embedded URLs, suggesting it functions as a link farm. The primary malicious URL identified is https://ggtraff.ru/strik?utm_term=5k+to+10k+running+plan+app, which is likely used to redirect users to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=5k+to+10k+running+plan+app In PDF document text
    • https://zeleruzonupaza.weebly.com/uploads/1/3/4/3/134358533/5241043.pdfIn PDF document text
    • https://cdn.sqhk.co/wuluzajiroz/jbidS8M/escape_girl_room_level_7.pdfIn PDF document text
    • https://cdn.sqhk.co/momujolo/MwhjjhS/free_download_game_bus_simulator_indonesia_for_android.pdfIn PDF document text
    • https://cdn.sqhk.co/kitaparek/gtTdgen/samsung_galaxy_xcover_4s_enterprise_edition_specs.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472188/normal_5fc757c836ffd.pdfIn PDF document text
    • https://nitonigizumori.weebly.com/uploads/1/3/0/7/130739712/bitozan.pdfIn PDF document text
    • https://cdn.sqhk.co/kevejonob/Rimjavg/tagirabixuxuxorurokaf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486742/normal_5fc9e831a0330.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/92ec37a0-25e3-4070-b288-2f9537c76cf4/tipi_teepee_tent.pdfIn PDF document text
    • https://s3.amazonaws.com/xaliwalufoguni/78407855901.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ee3a408-77f4-4a76-8105-cd3520f6db14/koveruluzurur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c531242-3f2f-4943-a240-06efaa62cca7/game_manual_1_ftc_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c64e3527-c458-4517-bdcf-6c0ab0ec277d/sogobebetixifox.pdfIn PDF document text
    • https://s3.amazonaws.com/mivokozibu/nemuba.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000deb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEB1 5096 bytes
SHA-256: 706da69aa291ec105ae7273e4c6a2aac191ede34069dba0ad222b6507ebe9ec5
font_01_sfnt_off0000f01c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF01C 5012 bytes
SHA-256: 8f095efdde48c024f1efc6293d5921da505d541e624ca2c491a1c8cc16810e95
font_02_sfnt_off0000fdcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDCB 11356 bytes
SHA-256: 31a042e2776b3996d0a0012f4f8adafe9439bb99fb934efab8db46d8022d496d

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