Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d4a2278c3882a33…

MALICIOUS

PDF

74.8 KB Created: 2021-04-01 05:26:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: d19ca6331c2e03d6e11a2ec395532019 SHA-1: 5b10256d6beeb15a0fb937591d197a2f02fdfa1a SHA-256: 9d4a2278c3882a33ea10feaba66c09ff7382210de9a34656ff5222701f7f7fc6
186 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics as a link farm containing a large number of external links, with a critical alert for a "PDF_SEO_LINK_FARM". The ML classifier also strongly indicated maliciousness. The primary purpose appears to be directing users to potentially malicious external sites, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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://druttle.ru/wix?keyword=bitcoin+faucet+list+2018 PDF link annotation
    • http://hotita.space/safe_haven_volunteer_nebraskask743.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/CtjdgtM/fast_money_halftime_report_cnbc_fix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375700/normal_5fdab7516ded1.pdfIn PDF document text
    • https://soxupewo.weebly.com/uploads/1/3/4/3/134392520/mobaboxaluj-povura-sudizubukun-rulataxegoso.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448110/normal_602abd913358a.pdfIn PDF document text
    • http://requiremcgood.com/upstream_intermediate_workbooko8asy.pdfIn PDF document text
    • https://divuvefa.weebly.com/uploads/1/3/4/7/134759037/birebemol.pdfIn PDF document text
    • https://xilasofuvi.weebly.com/uploads/1/3/4/6/134651230/1145191.pdfIn PDF document text
    • https://wuwogijate.weebly.com/uploads/1/3/4/8/134886767/83c68e2c03.pdfIn PDF document text
    • http://steblin.pro/xuwuwezekeropokiyixq4.pdfIn PDF document text
    • https://cdn.sqhk.co/doparibi/ijewagh/88271637364.pdfIn PDF document text
    • http://cashbackk.site/can_you_sue_hoa_for_discrimination5tzo2.pdfIn PDF document text
    • https://wuvesemoni.weebly.com/uploads/1/3/4/3/134335409/muxivi-wavukuzawo.pdfIn PDF document text
    • https://cdn.sqhk.co/bapuwanuvadi/JighYhj/53491234043.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390092/normal_60564cfee8393.pdfIn PDF document text
    • http://probkin34.xyz/rainbow_fish_aquarium_and_pet_shop_jabalpur_madhya_pradeshmk34i.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/limewub/nuwigi.pdfIn PDF document text
    • https://cef8af8d-7071-4339-ac50-fc417d371010.filesusr.com/ugd/a89196_9aafc3cd325646b59182199e03c00071.pdf?index=trueIn PDF document text
    • https://f84ffea9-2755-49c2-9cb5-47ca8b55fe65.filesusr.com/ugd/0adedf_ee1e0b15d3a64245b3a8ee413dbe0135.pdf?index=trueIn PDF document text
    • https://76bf42c0-7447-45ed-8dd3-33f9786ae3ae.filesusr.com/ugd/ba2c19_0a116d34a4454e32905a16e5600c92a5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wujixus/installer_android_studio_sous_ubuntu_18._04.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6BF 5348 bytes
SHA-256: 75d0b110ceac3477d153059e0ad1e9f4538a5f9ed7c279a6d34539f18c4a712d
font_01_sfnt_off0000f905.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF905 10924 bytes
SHA-256: 6bf000d67663fbd348cd329303f06dd2147fd1bd15abac86d668d987a54afcd1

Open this report in the interactive analyzer, or submit your own file for analysis.