Malicious PDF — malware analysis report

Static analysis result for SHA-256 287824fa247250d6…

MALICIOUS

PDF

80.7 KB Created: 2021-05-11 11:51:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f94975918d4c286de8ff931127cc7f7a SHA-1: b3e95e1d6eb15d28972a5c75c884569ee8ed0c6c SHA-256: 287824fa247250d63aca1f68c75358a3de7da20ea9272ac7fac4ef306d4f3515
176 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one specifically pointing to a URL related to resetting Bose headphones, suggesting a lure for phishing or malware. The presence of a 'PDF_SEO_LINK_FARM' heuristic indicates a large number of outbound links, and ClamAV detection confirms its malicious nature. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://golowaki.ru/strik?utm_term=how+to+reset+bose+ae2+headphones
    • http://ledozikatiresev.scienceontheweb.net/92100913975.pdf
    • https://cdn.sqhk.co/rozesivotix/f7jP3ia/70028114983.pdf
    • https://xejinifinedi.weebly.com/uploads/1/3/5/3/135305438/7599189.pdf
    • https://bilugejedegigel.weebly.com/uploads/1/3/4/0/134017605/2369138.pdf
    • https://cdn.sqhk.co/depivuni/iajhhea/xovulokedurosodevuxizenak.pdf
    • https://wivixape.weebly.com/uploads/1/3/4/8/134897282/mivasewatoze.pdf
    • https://cdn.sqhk.co/xesozugis/iihcjfE/33710066383.pdf
    • https://sinixamaruxibul.weebly.com/uploads/1/3/4/6/134653816/jupibejogutan_suket.pdf
    • http://xuzobinemipivor.mygamesonline.org/atmega8_16au_datasheet.pdf
    • https://wajadotufa.weebly.com/uploads/1/3/1/8/131857144/timijuzefeluvivez.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/a5898c40-d746-4792-8e71-2ae88c19e04b/online_floor_plan_generator_free.pdf
    • http://pofijiserige.onlinewebshop.net/silabus_biologi_sma_kelas_x_kurikulum_2020.pdf
    • https://uploads.strikinglycdn.com/files/771a5f02-2e0b-4c19-896e-f1014c796d58/hp_officejet_j4680_wireless_setup.pdf
    • https://uploads.strikinglycdn.com/files/60df3fcc-b3d5-401c-b2fe-cb2593bb4ecd/libro_de_educacion_fisica_2_secundaria_2017.pdf
    • https://uploads.strikinglycdn.com/files/db2a79ae-4d1f-4b7d-aca2-b666f4c0ee27/zenobaweg.pdf
    • http://soranodabiwegi.myartsonline.com/bounded_rationality_and_industrial_organization.pdf
    • http://nitusul.rf.gd/96944678065.pdf
    • https://uploads.strikinglycdn.com/files/7ad2e4a0-0a17-48e4-bd6d-7f504f2033b2/they_say_i_say_the_moves_that_matter_in_academic_writing_ebook.pdf
    • https://uploads.strikinglycdn.com/files/590945d8-ba28-43dd-ac83-66a31405a43a/drown_junot_diaz_quotes.pdf
    • https://uploads.strikinglycdn.com/files/e5aa4579-bdd1-4c83-ac28-e2f2463d177e/37405117102.pdf
    • http://mafilijesov.epizy.com/edit_text_with_same_font_online_free.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_off0000fb36.bin
0b99b092e1c26e4cb3aeffa4dda12554fc49cfb2f6048aaff26f937607b6600c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB36 5340 bytes
font_01_sfnt_off00010d62.bin
54beea7fd673249a2d40b7a55c6ee91e70d28649e0e56ba6750f1b82f7718748		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D62 11860 bytes

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