Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a38ef34d74829f5…

MALICIOUS

PDF

78.2 KB Created: 2021-03-26 05:57:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e55d713eec88422c5e66bb2bab85d89b SHA-1: bda89b37c7c85b8565eb431413c14b97411097a5 SHA-256: 7a38ef34d74829f5eeac46457ebdeda32ff21c9c8f1719bf1cecfdb24ea0fcde
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of numerous external links, including one pointing to 'soxebez.ru', suggests a phishing or malware distribution campaign. The 'SE_CALLBACK_LURE' heuristic further supports a phishing pretext, likely aiming to trick users into visiting a malicious URL or engaging with a scam.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://soxebez.ru/aws?utm_term=nitecore+i2+charger+for+e+cigarettes
    • https://cdn-cms.f-static.net/uploads/4462093/normal_601197b947188.pdf
    • https://cdn-cms.f-static.net/uploads/4464878/normal_6041d90cc1e69.pdf
    • http://tokiridevifo.medianewsonline.com/22886081013.pdf
    • https://cdn-cms.f-static.net/uploads/4417805/normal_6021ef942dce7.pdf
    • https://cdn-cms.f-static.net/uploads/4405208/normal_6053868d674eb.pdf
    • https://kiledakod.weebly.com/uploads/1/3/5/3/135385809/mimojuvuzif.pdf
    • https://powumebaporisav.weebly.com/uploads/1/3/4/8/134891471/vamez-sepituzired.pdf
    • http://simopuvoramawu.mywebcommunity.org/free_washington_redskins_logo_images.pdf
    • https://cdn-cms.f-static.net/uploads/4470408/normal_6035bd8892ee6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/dowesitobuga/bsc_math_books.pdf
    • https://s3.amazonaws.com/tazibabebamep/arbitersports_mobile_app.pdf
    • https://s3.amazonaws.com/sevoga/wogizijajudof.pdf
    • https://s3.amazonaws.com/dixaleko/telecine_play_apk_2019.pdf
    • https://f5f74d4f-f804-4d9b-9bfa-9964b2756261.filesusr.com/ugd/e389b3_081b68a8e5fa447681d1a66c68614eba.pdf?index=true
    • https://s3.amazonaws.com/temujonuwu/devil_may_cry_4_apk_obb.pdf
    • https://770ad53b-b55e-4e58-b1eb-3709f41304f7.filesusr.com/ugd/98e298_4373292e8a014805a1f33995e50ff36f.pdf?index=true
    • https://528f6e5c-6927-42ef-b7a5-a8f9c349750c.filesusr.com/ugd/07b979_74cb95806d3644c7b12a693a604e956e.pdf?index=true
    • http://gubawakelu.onlinewebshop.net/m-audio_keystation_pro_88_driver_mac.pdf
    • https://s3.amazonaws.com/lorifawuvawot/68511715609.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_off0000f19f.bin
7bc5ceb0a7d3641704595981a75e560a65417f940591e27c737a644cd19ddd22		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF19F 5212 bytes
font_01_sfnt_off00010362.bin
601bdce70fd07f2dadc9758b083354985bbc4f1e3195ac151097905c2bf93086		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10362 11620 bytes

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