Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ada9fc2cf1c9df6…

MALICIOUS

PDF

91.0 KB Created: 2021-03-30 01:34:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: b4cdc0a27051190840dc940b88197cd4 SHA-1: 80e5f80a7b5b61d75cf128e75fbb72a3fc7e7944 SHA-256: 4ada9fc2cf1c9df6356d0c3956b4d69cc18ac4405ca614ad3dd87052126e7210
186 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm with numerous external URLs. The document body, though heavily obfuscated, suggests a deceptive lure related to animals and humans. The embedded links and the PDF structure strongly indicate an attempt to redirect users to potentially malicious sites, consistent with phishing or SEO spam tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://jumiwimov.ru/strik?utm_term=que+relacion+hay+entre+los+animales+y+los+seres+humanos PDF link annotation
    • http://hookup153.space/79317671987m547n.pdfIn PDF document text
    • https://cdn.sqhk.co/pigexebobe/E4gimOT/abita_town_hall_bingo.pdfIn PDF document text
    • http://pisibebix.22web.org/32608657954.pdfIn PDF document text
    • http://fokefetebebinin.66ghz.com/ministry_of_health_uganda_clinical_guidelines.pdfIn PDF document text
    • http://vertigoa.online/79664064142jbkog.pdfIn PDF document text
    • https://cdn.sqhk.co/wuxaguzifep/sgjgd92/spotify_using_cellular_android.pdfIn PDF document text
    • http://ijmalan.xyz/unlimited_power_palpatine_mp3skh3z.pdfIn PDF document text
    • https://cdn.sqhk.co/limizolaxa/jfhhdjd/guilty_conscience_070_shake_tame_impala.pdfIn PDF document text
    • https://cdn.sqhk.co/ferorigife/iiShakR/sky_roller_game_online.pdfIn PDF document text
    • https://cdn.sqhk.co/virurewev/dgh7jxd/sebev.pdfIn PDF document text
    • http://merishwheelrecords.com/40859468139eqf0q.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxofidipo/lM8ji1G/15078366719.pdfIn PDF document text
    • https://cdn.sqhk.co/kosenopelid/2jihchc/7171968275.pdfIn PDF document text
    • http://fupodiruza.66ghz.com/asphalt_8_airborne_size.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://dc688580-c0ec-4ade-910b-7abffd870ab4.filesusr.com/ugd/096b61_1e8cc4532f1341e88ee7e850c1e0a70a.pdf?index=trueIn PDF document text
    • https://a1c9bafd-2917-4c1b-b79c-a4b44a941470.filesusr.com/ugd/f0f215_348cc490b47f430791e08e32192f2ea0.pdf?index=trueIn PDF document text
    • https://35548484-ce42-4b18-9d9d-834326683263.filesusr.com/ugd/a221b6_38e809d06db741db9c0f2e0f174c9f9f.pdf?index=trueIn PDF document text
    • http://lobosenus.epizy.com/wikutawodoxubotu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/245f6992-88bb-4fbe-a17c-53d411a6f499/vupekoxutoga.pdfIn PDF document text
    • http://pibumox.rf.gd/student_centred_learning.pdfIn PDF document text
    • https://5090c2af-253d-40c3-bfb7-942fc6db26b0.filesusr.com/ugd/0511f5_3328d4e292234cd09986b06febb2cfd6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/315fe97d-9cb1-4f9a-a943-b0bf0463f007/healthy_breakfast_smoothie_ideas_for_weight_loss.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/147fc2af-0aed-4c5d-a07f-bac57c5220a8/families_as_they_really_are_ebook.pdfIn PDF document text
    • https://80b2a579-f9ed-4aa0-b91a-ac3c8973c086.filesusr.com/ugd/353d00_30f89024bca84f3da5e0a9f03f124b52.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000122b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122B9 5204 bytes
SHA-256: c34fa7dc9cc3026e9ad7a4e86e19d15cd58cc06a2000d7e9c163e1223a958f7e
font_01_sfnt_off00013442.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13442 12432 bytes
SHA-256: 025a15f35871104bce1f5c6a4d92e2f747ec08cc591ae8bacb514c2e1c772b2c