Malicious PDF — malware analysis report

Static analysis result for SHA-256 26114ce6046cbda3…

MALICIOUS

PDF

87.5 KB Created: 2021-03-31 18:03:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e781a289e26648822e82afedd2c53c3c SHA-1: 233798f6ae2fc14402dd503cf8b5ea128cc55ddd SHA-256: 26114ce6046cbda3e5da2281277e88394712034e984b6dfa0e41844af966c680
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable domains, indicating a link farm or SEO spamming operation. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The embedded URLs and the document body's deceptive title suggest a lure to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

Heuristics 6

  • 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.
  • 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 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://resalured.ru/strik?utm_term=how+to+adjust+time+on+g+shock+ga+1000
    • http://fimewot.xyz/fidoxofisemojilitivajranqk.pdf
    • https://zatiwakap.weebly.com/uploads/1/3/1/8/131871625/a47febf17.pdf
    • https://nulowuze.weebly.com/uploads/1/3/4/6/134614321/rasefeka.pdf
    • http://muzhskoizhurnal.ru/affirmations_for_self_lovevsuvy.pdf
    • https://zinegekoxemajaj.weebly.com/uploads/1/3/4/7/134767253/098cb64000c02.pdf
    • https://jagavovukivotu.weebly.com/uploads/1/3/4/8/134881855/vewipafod.pdf
    • https://cdn-cms.f-static.net/uploads/4474449/normal_602b443ba40b1.pdf
    • http://evilcheats.fun/how_to_become_a_millionaire_business_owner42g8r.pdf
    • https://static.s123-cdn-static.com/uploads/4416143/normal_5feee585dd9c7.pdf
    • https://cdn-cms.f-static.net/uploads/4485576/normal_60641352bb687.pdf
    • https://poxixarusel.weebly.com/uploads/1/3/4/1/134131789/2449861.pdf
    • http://predouche.xyz/jefedidamivosuwoteradpejl.pdf
    • http://plafond.xyz/realidades_2_capitulo_2b_quizletka3y4.pdf
    • http://alex-travel.moscow/we_happy_restaurant_modgxt87.pdf
    • https://static.s123-cdn-static.com/uploads/4368242/normal_6002d18d76403.pdf
    • http://wonder-ita.space/66895617208vdjuo.pdf
    • http://hesap-al-sat.com/metrica_poema_a_julia_de_burgosogpeb.pdf
    • http://hookup154.fun/pukovarevoi55s.pdf
    • http://merishwheelrecords.com/white_rodgers_thermostat_1f80-261_manuals08cz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://6525eaf8-9a42-4119-9fb4-c3d475b3b78e.filesusr.com/ugd/80bfa9_c9b8075906ea4ae68e8b5ff822290295.pdf?index=true
    • https://uploads.strikinglycdn.com/files/870f6778-d965-4f1d-9763-b87c1dca2a9e/cravings_by_chrissy_teigen_tunisian_mist_20-piece_dinnerware_set.pdf
    • https://ce2645ba-e89a-43d5-afff-5c0150757291.filesusr.com/ugd/c63dba_51624e8b37d24d86afb88f973acbc08c.pdf?index=true
    • https://uploads.strikinglycdn.com/files/f0bd634b-4c37-4c36-a9b2-8e966b57b97d/city_of_thieves_summary_chapter_3.pdf
    • https://uploads.strikinglycdn.com/files/7716f308-32a0-4246-8fd2-04207b7c2801/carry_on_luggage_sale_macys.pdf
    • https://9505ca4c-dfdc-4941-8fde-ded35496d0c9.filesusr.com/ugd/2097ab_62b810b42502409a89be3d44e4f2210d.pdf?index=true
    • https://d115d978-d96a-40c8-9764-5d959708fc35.filesusr.com/ugd/436160_2a323d13294842e3a7ae496ad79161dc.pdf?index=true
    • https://uploads.strikinglycdn.com/files/fae5168c-9447-4b02-a3ae-7d290cedc642/is_simon_dead_in_shadowhunters.pdf
    • https://uploads.strikinglycdn.com/files/77a8ec67-8d45-4ab7-af67-f54ae8114373/the_wicked_king_full_book_online_free.pdf
    • https://d73c234d-0e3d-497d-8108-d5659bace061.filesusr.com/ugd/58a813_c439d124ecbb449bb2577ab1d902bf5b.pdf?index=true
    • 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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000100f8.bin
58a63cead2ae3a1992380cd380aad8c3d99fed268f0815c69e24bfd5c8f26ffb
pdf-font-stream PDF embedded font (sfnt) at offset 0x100F8 5612 bytes
font_01_sfnt_off00011405.bin
bb8f29bcc8006c17d8a99317aa7486188aae5ec3ed8f3ba95b09cb22d85b99ff
pdf-font-stream PDF embedded font (sfnt) at offset 0x11405 11056 bytes
font_02_sfnt_off00013a2f.bin
21d2c517cc0d2781f643886744ab2248bbe8d92ed1ab736cc2ad748918d5c6f2
pdf-font-stream PDF embedded font (sfnt) at offset 0x13A2F 16296 bytes