Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a190c3a045c86be…

MALICIOUS

PDF

123.0 KB Created: 2021-03-30 00:12:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 7af41f39db8a997402a05541a96d33d8 SHA-1: 576d4e64c1b6d69634289b6ffb1ca049ccd3e9bc SHA-256: 9a190c3a045c86be9850f53ffda2e8cd479e562928eebaff0134649efb251dff
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://lozipotod.ru/strik?utm_term=business+communication+now+4th+canadian+edition+pdf PDF link annotation
    • https://zinegekoxemajaj.weebly.com/uploads/1/3/4/7/134767253/vugokiboka_dosozakoxalup_fopugejalumit.pdfIn PDF document text
    • https://fewefemuge.weebly.com/uploads/1/3/4/3/134372507/kitojo_velako_kekapafifogobo_jiririz.pdfIn PDF document text
    • https://cdn.sqhk.co/rabuvimi/ididuHv/tapozit.pdfIn PDF document text
    • https://fovojewonot.weebly.com/uploads/1/3/4/6/134669065/2161482.pdfIn PDF document text
    • https://gawufuxawejax.weebly.com/uploads/1/3/1/8/131855981/tigorez.pdfIn PDF document text
    • https://zixavuxo.weebly.com/uploads/1/3/1/3/131398386/db6956280f3.pdfIn PDF document text
    • https://cdn.sqhk.co/tuzevawu/chihdgc/star_wars_the_old_republic_30_day_subscription.pdfIn PDF document text
    • https://wavenugila.weebly.com/uploads/1/3/4/8/134852162/936848.pdfIn PDF document text
    • https://nixejovebomir.weebly.com/uploads/1/3/1/3/131380485/faxofavisak.pdfIn PDF document text
    • https://dixitelenamipum.weebly.com/uploads/1/3/4/3/134380202/2635491.pdfIn PDF document text
    • https://cdn.sqhk.co/semexixok/hbGFjcI/sean_hannity_car_shield_promo_code.pdfIn PDF document text
    • https://cdn.sqhk.co/kavejufa/jiGH6hd/50976614139.pdfIn PDF document text
    • https://pikopivani.weebly.com/uploads/1/3/4/5/134510180/furuvidiwatilo_dibazunox_mibevafamal_dowujusuwarulim.pdfIn PDF document text
    • https://cdn.sqhk.co/medefitama/fiaLO29/79769658452.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://18e99e0c-7034-4a8c-9069-267580a295b8.filesusr.com/ugd/b337f5_2482e08904e94ecc862593c40546cae6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdf56fd5-5e78-4cb5-9486-bd44fc936b55/wazifa_to_make_someone_fall_in_love_with_you_in_urdu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b34a8b48-d9f3-4b80-9b6c-87c843df1c8c/bowumimagaba.pdfIn PDF document text
    • https://305aa2e3-e1d2-413d-aa2e-f1bb83d03ded.filesusr.com/ugd/92ee2b_948ed9ee8cad4952a0162e2bdbb1a10a.pdf?index=trueIn PDF document text
    • https://33edd578-4186-4695-89f3-f56a5a23fc53.filesusr.com/ugd/f17c08_21d35c8080064e849535b0dfcf68cca2.pdf?index=trueIn PDF document text
    • https://01477de9-116b-42a6-a62c-54244336611e.filesusr.com/ugd/dea9e9_c7c4ddb6d86c42e1b20c4eebd1d23c01.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9307e4d-31d9-4082-b3b2-23d4ba998f83/2053466705.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5217bd86-7643-4588-a58f-2c41d9ac8fd7/casio_pro_trek_tough_solar_set_time.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9eb7abb7-29b8-4dbb-a5d9-60bf2fb7adcf/dragon_age_origins_rogue_stats_guide.pdfIn PDF document text
    • https://63b1f34b-4847-450f-8d9a-4788d10e1cf5.filesusr.com/ugd/451a43_3770150a483f40e49b92371337203db5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/75561d25-3de1-4cce-b350-7f914817cda3/82840470915.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09b6b4ad-b477-4576-bca2-96c696c088b5/lodge_cast_iron_recipes_for_chicken_pot_pie.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
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001a5aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A5AA 5496 bytes
SHA-256: c0fad84d3c61139d933f8f22a0409b0babf64d0f3dbf17093d0935e3077a4e9d
font_01_sfnt_off0001b857.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B857 11004 bytes
SHA-256: 86945f6c09469b98fae82a00a19078c08de906509d42b4b1d36e0bd3f0376a13

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