Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f279c673ee61139…

MALICIOUS

PDF

92.4 KB Created: 2021-04-02 20:56:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 0469d70cdc945597900debc0c3f1e77e SHA-1: ea55dbeb1cd6b05349df2fd3ef3f926d330004c1 SHA-256: 5f279c673ee6113996d8ab9de46c931b9a47db9574a65113643f38895d21dddf
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially harmful content. The document body, though heavily obfuscated, appears to be a lure related to university admissions, likely intended to trick users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://dugedepap.ru/123?utm_term=shahjalal+university+admission+circular+2018-+19+pdf PDF link annotation
    • http://bnatural.space/13574812268ztviy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403537/normal_60225312d0bac.pdfIn PDF document text
    • https://naruvoraxosu.weebly.com/uploads/1/3/0/8/130873998/4309721.pdfIn PDF document text
    • https://lugilalosu.weebly.com/uploads/1/3/4/3/134314137/tezufusipet.pdfIn PDF document text
    • https://cdn.sqhk.co/firijanab/f4jaaLB/nowilo.pdfIn PDF document text
    • https://xopilujipuwoka.weebly.com/uploads/1/3/4/8/134886601/defesalef-mimax-rebumewoxetipij-zulokanori.pdfIn PDF document text
    • http://help-service-support.com/bejexirixosilolefoxaz2iq7.pdfIn PDF document text
    • https://monuwapomobi.weebly.com/uploads/1/3/4/7/134730240/1479879.pdfIn PDF document text
    • https://fagudigozupubu.weebly.com/uploads/1/3/6/0/136042622/jobir-gopajur-tibupafu-kenumiwebam.pdfIn PDF document text
    • https://cdn.sqhk.co/vibisimak/8ifAgdx/game_screen_recorder_pc_free.pdfIn PDF document text
    • https://cdn.sqhk.co/zatovafer/hbsXgcZ/3082889427.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484821/normal_60159485b162f.pdfIn PDF document text
    • http://sale20.site/83213142152d83bu.pdfIn PDF document text
    • https://gurelupukuji.weebly.com/uploads/1/3/0/7/130775622/pazixilonoxad-xudemi-pijik-nesanezugize.pdfIn PDF document text
    • https://nenejafaf.weebly.com/uploads/1/3/5/3/135393494/4fc3f18f0.pdfIn PDF document text
    • http://grandov.pro/rezopibicnip.pdfIn PDF document text
    • https://cdn.sqhk.co/folukize/fhCFfu0/facts_about_the_pyramids_of_egypt.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469617/normal_6028e3b9412b3.pdfIn PDF document text
    • https://paboripiniw.weebly.com/uploads/1/3/0/7/130739049/gebejapemos_xesanivef_dabaxijopuvawil.pdfIn PDF document text
    • https://cdn.sqhk.co/posiraki/GGmiioK/39793298130.pdfIn PDF document text
    • https://sukaxivex.weebly.com/uploads/1/3/4/8/134895869/79b0ae3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://9e1b5e4e-b4ab-405b-8fdf-b3b6d7b19c28.filesusr.com/ugd/94ea38_165782d63da442b4b9bad426c65e9f7b.pdf?index=trueIn PDF document text
    • https://6f2fb29c-15f2-4b08-b525-3eb91a7f0a41.filesusr.com/ugd/c3548c_1437b05cdee44ac0ba805ce559d68484.pdf?index=trueIn PDF document text
    • https://041aa876-b65b-432c-96c0-58c8b295a4e4.filesusr.com/ugd/90d19e_addc9dbb1f55457bac96fbf43c82d794.pdf?index=trueIn PDF document text
    • https://8d537faf-e869-4ed9-a29f-988560fab1dc.filesusr.com/ugd/0cce51_c3d88d75cd1c44da872ed326f8b7f756.pdf?index=trueIn PDF document text
    • https://66f9c2bc-82a6-463d-9ccd-9c94d3d8805e.filesusr.com/ugd/b361c6_9908bc688fa84dfc9352fbf37650c4c0.pdf?index=trueIn 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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f8e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E0 6444 bytes
SHA-256: 24ab12e3508dd39f203de04606c5fb9513cd1f557fe5f6a931c4e6865c7a0190
font_01_sfnt_off00010eba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EBA 14596 bytes
SHA-256: e52cf25e24b907dc94315e60e6956b51b52ea8a18deb14c1c2074ceadf08fce7
font_02_sfnt_off00013a70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A70 11408 bytes
SHA-256: c6e78bda590bfdb2d98ed65407e4f4c12498e4c02ec034b6f8b2cac1b8167d38

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