Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d0f49a766304ca0…

MALICIOUS

PDF

86.6 KB Created: 2021-02-03 11:53:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: cbac15ac0ba6afd668e979559578aaa2 SHA-1: 3c6ac379efb2b8e5dda40b0cc4d77efd29dc98ca SHA-256: 9d0f49a766304ca097ff7ab6d2095952e644b7fb66f63986f0f87a6d5e54d5a9
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm. It contains numerous external links, many pointing to disposable hosting services, suggesting an attempt to redirect users to potentially malicious content or phishing sites. The presence of a URL with a 'utm_term' parameter further indicates a campaign-like structure designed for tracking user engagement with lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://bologen.ru/123?utm_term=fnaf+ucn+apk+here PDF link annotation
    • https://cdn.sqhk.co/nagigureti/338yYb3/bus_simulator_18_activation_key_free_download_pc.pdfIn PDF document text
    • http://zonixutazexe.iblogger.org/2745189254.pdfIn PDF document text
    • https://cdn.sqhk.co/kepebeso/ZmfpjdS/affordable_wedding_cakes_nyc.pdfIn PDF document text
    • https://cdn.sqhk.co/wutalididow/UoieR59/52163457173.pdfIn PDF document text
    • https://cdn.sqhk.co/feketukadoz/Xhdgcln/castle_crashers_remastered_xp_glitch_2018.pdfIn PDF document text
    • https://sotumeramevoma.weebly.com/uploads/1/3/0/9/130969712/taliravirela-nesexiweno.pdfIn PDF document text
    • https://cdn.sqhk.co/lilapanorup/akhevjh/marvel_contest_of_champions_hack_without_human_verification.pdfIn PDF document text
    • https://wirupexulabajes.weebly.com/uploads/1/3/5/3/135322132/wadife.pdfIn PDF document text
    • https://cdn.sqhk.co/nezusoxe/hgysRom/38834298749.pdfIn PDF document text
    • https://cdn.sqhk.co/fowijuseziju/hi2JJjb/spades_royale_coins.pdfIn PDF document text
    • https://cdn.sqhk.co/miloxuso/tiejhid/gizipigidazegamatopuwugek.pdfIn PDF document text
    • https://jipagulus.weebly.com/uploads/1/3/1/3/131379543/puzepevokumag.pdfIn PDF document text
    • http://suxiselukex.66ghz.com/best_dj_songs_in_the_world.pdfIn PDF document text
    • https://cdn.sqhk.co/xunijejozi/Xwid0Hl/toca_life_world_town_guide.pdfIn PDF document text
    • https://nawivavunof.weebly.com/uploads/1/3/4/6/134669961/puputugefoza_goxewadamupex.pdfIn PDF document text
    • https://cdn.sqhk.co/moxulofilose/Z5HgdWp/deeeep._io_beta_tree.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/susonanezaj/fun_sheets_brain_teasers_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/bokofapig/xagakujonisubugeb.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e353.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE353 6392 bytes
SHA-256: 71315d36a94a0c21f92d5bf5b94480be9d330be00a0ae1b0e3dc56e760417bf4
font_01_sfnt_off0000f2db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2DB 3260 bytes
SHA-256: eeefff25e00c0e5bc5e00300c330114985a19a11023e42520f699fe996f90b1c
font_02_sfnt_off0000fea0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEA0 4556 bytes
SHA-256: ca78124759cecdb3b0d51e85e919b14340b085d733337600cb72e84d6c2cdbae
font_03_sfnt_off00010e0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E0C 17784 bytes
SHA-256: d6f11962f46d241c9532bc3c8c74d602a5d6f014a68c509ab766365711525ff8
font_04_sfnt_off00013ea4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EA4 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333