Malicious PDF — malware analysis report

Static analysis result for SHA-256 097fd1470d024ee1…

MALICIOUS

PDF

75.7 KB Created: 2021-04-05 15:32:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fd0b54094553838ccf151c4bfa43e355 SHA-1: 7f8a4eff00f6191ca302e1ddbdd7f5fead26518a SHA-256: 097fd1470d024ee130f563f7eb2060e8b05fcb088e597df2c3974180e0362be0
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically identified as a link farm on disposable hosting, indicating a malicious intent to redirect users. The ML classifier and ClamAV detection strongly suggest this PDF is malicious, likely a phishing or trojan delivery mechanism. Although no scripts were extracted, the presence of many external links points towards an attempt to download further malicious content or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pelibifir.ru/strik?utm_term=what+to+eat+at+night+for+flat+belly
    • http://wwwbcpzonasegura-viabcp.com/23028453021w72l3.pdf
    • http://submonster.xyz/formas_de_usar_chalina_con_vestidow3mwq.pdf
    • http://lnstagramverifiedbadge-form.com/cisco_3750_x_manualh3d84.pdf
    • http://gunodopo.22web.org/autoroot_tools_apk_latest.pdf
    • http://winoorama.space/16472257422feue2.pdf
    • http://wonnaturila.space/the_end_is_nigh_phrasec46ru.pdf
    • http://mklhhhh.space/97566293267rfawi.pdf
    • http://walkover.me/liligegejisamigozozaditoxpz76p.pdf
    • http://raxejudesezix.scienceontheweb.net/how_to_help_healing_after_c_section.pdf
    • http://maddot.space/droid_cpc_romsqy7y6.pdf
    • http://nakozek.mypressonline.com/bontrager_node_1.1_for_sale.pdf
    • http://7gusevshop.website/lipejetojiboxirofofebugulo9an.pdf
    • http://anarchymedya.com/can_the_verizon_ellipsis_7_be_used_as_a_phonevf690.pdf
    • http://fogafiv.mypressonline.com/magic_bullet_washing_instructions.pdf
    • http://rupazaduxil.mywebcommunity.org/t4_phage_structure.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/dufekifaral/45559561518.pdf
    • https://s3.amazonaws.com/dosipive/vocabulary_personality_adjectives_exercises.pdf
    • https://s3.amazonaws.com/numunenoji/how_to_read_a_novel.pdf
    • http://sibugisijan.epizy.com/18710125319.pdf
    • https://s3.amazonaws.com/mexesazaxasa/can_i_use_my_android_phone_as_a_roku_remote.pdf
    • http://jokosen.atwebpages.com/92686781109.pdf
    • http://vamagirizotaro.rf.gd/rapida_pressure_cooker_6l.pdf
    • https://s3.amazonaws.com/pavujiniz/fikevuxi.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb44.bin
6522053613562633d98cfeb19f4fa73ee2ccd2ca32601b1e3591d3a46da56033
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB44 5108 bytes
font_01_sfnt_off0000fcbd.bin
52aeb396b86cfa5f2ded59bf747e10e835faa4c2b81464dda23b4d545c07218b
pdf-font-stream PDF embedded font (sfnt) at offset 0xFCBD 10752 bytes