Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bda1a02aa156602…

MALICIOUS

PDF

74.1 KB Created: 2020-12-23 05:48:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 306ba70e475ebbe00add8c050149dabb SHA-1: 4d501961b8b5eac49a83988ca5b1d3318b55be37 SHA-256: 2bda1a02aa156602a19c5cc51aa0dc8398990f84cfd8901c3421ea89cf61b9ff
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, suggesting a phishing or malware distribution campaign. The heuristic firings indicate the document is designed to redirect users to malicious infrastructure, likely for credential harvesting or further payload delivery. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

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-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/strik?utm_term=zombie+survival+mod+apk+data
    • https://xuzelakojit.weebly.com/uploads/1/3/4/5/134593048/tatise_jukigonusuj_vadodabidiv_tidewuvofususi.pdf
    • https://jomigotub.weebly.com/uploads/1/3/4/7/134748998/491144.pdf
    • https://cdn-cms.f-static.net/uploads/4378152/normal_5f8abc90a2c81.pdf
    • https://cdn-cms.f-static.net/uploads/4422368/normal_5f9c356fcc9a7.pdf
    • https://static.s123-cdn-static.com/uploads/4492529/normal_5fc48936814f0.pdf
    • https://tepupusaf.weebly.com/uploads/1/3/4/5/134585026/fibolivi-rixuvepat-nazujagovug.pdf
    • https://cdn-cms.f-static.net/uploads/4416150/normal_5f98140c6822f.pdf
    • https://nezododirexu.weebly.com/uploads/1/3/0/8/130813510/futudajukunedisopuk.pdf
    • https://bozaxadoduzake.weebly.com/uploads/1/3/4/3/134306622/2525899.pdf
    • https://zapizurur.weebly.com/uploads/1/3/4/9/134900478/8590623.pdf
    • https://cdn-cms.f-static.net/uploads/4365621/normal_5fb545ae8f8f7.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wovitiku/wuvakekegajomebivinirowi.pdf
    • https://static1.squarespace.com/static/5fc5707e1c8c741314508ea2/t/5fd0e458fc93c51d16ea9100/1607525464563/my_anime_stickers_2_wastickerapps_for_whatsapp.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_off0000ccbb.bin
6ef2370abee38a6887d0013ab573a77279faf6ab07bbb5944124bafd567ef71a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCCBB 5328 bytes
font_01_sfnt_off0000dec1.bin
5622a2b991149fde0572c25a67d66b8a7fabef220323f4ba457eea87028a1097		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDEC1 11692 bytes
font_02_sfnt_off0001068a.bin
fcb9eb6dda9bd85871dea2af886fe36482f59afbed4642006e79d2ab71ff4177		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1068A 16120 bytes

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