Malicious PDF — malware analysis report

Static analysis result for SHA-256 14063a26b8069c65…

MALICIOUS

PDF

76.0 KB Created: 2021-04-11 07:48:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: b1f6da17a4fcb795c7f6a71a5d6072b0 SHA-1: ade866ef29cb497266bb1e62ec931efc79c60028 SHA-256: 14063a26b8069c65ce1db734ce448943c7f02b6c3e0a84de823a42a8f645c310
226 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

This PDF file is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. The document body, though truncated, combined with heuristics like 'SE_BROWSER_INSTALL_LURE' and numerous external links, suggests a social engineering attempt to trick users into downloading malicious content disguised as a browser update or extension. The presence of a link farm on disposable hosting further supports a malicious intent, likely to distribute further malware or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://mezovuduw.ru/strik?utm_term=dama-dmbok2+pdf+instant+download PDF link annotation
    • http://kudikadip.getenjoyment.net/7762627478.pdfIn PDF document text
    • https://penuwepilaxol.weebly.com/uploads/1/3/4/7/134756509/folukabokimuwosuke.pdfIn PDF document text
    • https://xovawezovikax.weebly.com/uploads/1/3/0/9/130969403/778097c865653b.pdfIn PDF document text
    • https://ruxunomitebapat.weebly.com/uploads/1/3/1/6/131606858/xuposabikujeb.pdfIn PDF document text
    • https://nilesezijifata.weebly.com/uploads/1/3/4/8/134885493/sudaxonupam-ruwowebaku-gojetaxifivi.pdfIn PDF document text
    • https://cdn.sqhk.co/tatidukigag/bhaX6je/inside_the_box_meaning.pdfIn PDF document text
    • https://cdn.sqhk.co/dedesonor/4msijC2/hello_neighbour_act_1_ps4.pdfIn PDF document text
    • https://cdn.sqhk.co/rilabotib/0rxAH1R/german_ardennes_offensive_1940.pdfIn PDF document text
    • https://cdn.sqhk.co/vixukose/hNicjam/alarm_clock_apple_homekit.pdfIn PDF document text
    • https://cdn.sqhk.co/rapurakoke/rjcjSfK/crazy_zombies_9.pdfIn PDF document text
    • https://renobikedasel.weebly.com/uploads/1/3/4/8/134897329/zedapimova_xojakimamakapun.pdfIn PDF document text
    • http://mibotirekusiw.mywebcommunity.org/67535968963.pdfIn PDF document text
    • http://tesevamomavuruf.22web.org/20700932089.pdfIn PDF document text
    • https://zugufirit.weebly.com/uploads/1/3/1/1/131163535/0f8653bd99a67.pdfIn PDF document text
    • https://darugagoremu.weebly.com/uploads/1/3/4/5/134588092/vulikujipileba_wuxawe_voluk_zadexa.pdfIn PDF document text
    • http://salizurewaki.mypressonline.com/height_balanced_tree_in_data_structure.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bigapenegig.atwebpages.com/38899679274.pdfIn PDF document text
    • https://ff06b2c9-6223-4357-b4d5-1bf3807c749f.filesusr.com/ugd/717131_2c675e994acf4992ab2bc30e9d71b3d4.pdf?index=trueIn PDF document text
    • https://34e2f0dc-0077-42bd-a047-efa2502e92af.filesusr.com/ugd/8a05ec_ab00a7b2f59643edaa9c26d64f7841b0.pdf?index=trueIn PDF document text
    • https://37bdae34-bb2f-403f-997c-54a7c09d9c06.filesusr.com/ugd/dc98cc_a4975ae9a47a428b85a36a90ebdd79fd.pdf?index=trueIn PDF document text
    • http://puzenufamem.rf.gd/81785119840.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_off0000ebbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBBE 5552 bytes
SHA-256: 30b98c7982da9ec793d198d60df6b76cfa00c32235119ce9735a87295e389d22
font_01_sfnt_off0000feb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEB1 10408 bytes
SHA-256: 056bdefd2cac241da5e09bc08fdc151b0c0f6c59f1ac5fb790c5490dfd231b30