Malicious PDF — malware analysis report

Static analysis result for SHA-256 a14f12b84c4d90ae…

MALICIOUS

PDF

74.0 KB Created: 2021-02-11 09:30:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: d5c73eed9c09cc6976ae27a42bd77cf5 SHA-1: 30ccce00c8b9fa24d0e1cc0580e658669015e016 SHA-256: a14f12b84c4d90ae286e5c54d20a21e70b64ed00c785ecbee88d055a8e03a0eb
244 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier, and also detected by ClamAV. It contains a large number of embedded links, many pointing to disposable domains and redirector infrastructure, indicating a link farm designed to distribute malicious content. The primary malicious activity observed is the extensive use of link farms to direct users to potentially harmful sites.

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://yafferge.ru/wb?keyword=matematik%20bile%C5%9Fik%20faiz%20form%C3%BCl%C3%BC In PDF document text
    • https://cdn.sqhk.co/vupapevixu/iheichg/shark_ion_p50_ic162_reviews.pdfIn PDF document text
    • https://cdn.sqhk.co/konafomaz/jggdMCp/52566447817.pdfIn PDF document text
    • http://potenciy.xyz/ram_drift_car_simulator_unblocked_76ieuzw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4503050/normal_5ff2b30019011.pdfIn PDF document text
    • http://qrastenmap.online/victorious_season_5_episode_listn8mtv.pdfIn PDF document text
    • https://cdn.sqhk.co/xusawikorut/Wjjgfjd/guguseparunewukozabanom.pdfIn PDF document text
    • https://cdn.sqhk.co/buzomesil/wLgdsha/tires_plus_battery_coupon.pdfIn PDF document text
    • https://cdn.sqhk.co/vimerokil/cgdehaQ/titesonidafugiwumevomo.pdfIn PDF document text
    • https://winugemu.weebly.com/uploads/1/3/1/0/131070294/af4b2cc53f5fd.pdfIn PDF document text
    • https://cdn.sqhk.co/dojerilu/gjU0Fib/mini_golf_lancaster_pa_rt_30.pdfIn PDF document text
    • https://cdn.sqhk.co/sifajoxojif/chgcE0f/easy_ohv_trails_near_me.pdfIn PDF document text
    • http://crysety.xyz/ruzaxetobabozuvbpjw3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392861/normal_6011041f6ae10.pdfIn PDF document text
    • http://wdd13.ru/bsec._teletalk._com._bd_admit_cardzc559.pdfIn PDF document text
    • https://nagipunewemog.weebly.com/uploads/1/3/5/3/135315215/35dcc9227ca.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kusaletexozibov.epizy.com/utorrent_free_pc.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_off0000d26b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD26B 5020 bytes
SHA-256: 559381b067b1609118b78b971ac07da9c60306aff7236bea202a5f12ac6b84de
font_01_sfnt_off0000e155.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE155 5364 bytes
SHA-256: 9bb88f43b8415a69678cfeb14ab2f96ca996db55909a717a14b058fc86215fe4
font_02_sfnt_off0000f35c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF35C 11764 bytes
SHA-256: 7166028c6a894570ba0b9d7a5217787412fabf997e716787cd2dd215193b9e5a

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