Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6da6bcdb264464f…

MALICIOUS

PDF

89.8 KB Created: 2021-05-08 05:30:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 0212a321162512fa546e03c7b1179cb6 SHA-1: bfdd4f3ea992e22f42ddd43038769630904b3357 SHA-256: a6da6bcdb264464f4d495556ff1f191de2dbaf8030d1e7bafab32cc4acd2a26a
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 hosted on disposable domains, indicating a link farm or phishing attempt. The heuristic 'PDF_SEO_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggest this malicious intent. The embedded URL 'https://jottigo.ru/strik?utm_term=how+to+put+photos+back+on+iphone+from+icloud' further supports a lure-based attack pattern, likely aiming to redirect users to malicious content or phishing sites.

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://jottigo.ru/strik?utm_term=how+to+put+photos+back+on+iphone+from+icloud PDF link annotation
    • https://pumoguviponurin.weebly.com/uploads/1/3/4/7/134773216/laful.pdfIn PDF document text
    • https://sikefenuvip.weebly.com/uploads/1/3/4/0/134012601/4456616.pdfIn PDF document text
    • https://fisofomopix.weebly.com/uploads/1/3/4/6/134603918/647b7b56666e9.pdfIn PDF document text
    • https://gajegebukorivip.weebly.com/uploads/1/3/4/4/134487765/d666c79a600.pdfIn PDF document text
    • https://zegasapazenavu.weebly.com/uploads/1/3/5/3/135326880/vapabirumazaj.pdfIn PDF document text
    • https://sopezafenivi.weebly.com/uploads/1/3/0/9/130969371/d97bed706bc4.pdfIn PDF document text
    • https://cdn.sqhk.co/nepodowu/viiuifo/cppdroid_c_c_ide_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/tisewesir/3N9ihHE/toy_truck_rally_2_mod_apk.pdfIn PDF document text
    • https://fosovumukudire.weebly.com/uploads/1/3/4/2/134235423/wolopixepu_deloxepaxopenu_jokumijunagege_duwafavev.pdfIn PDF document text
    • https://naxedomabaxa.weebly.com/uploads/1/3/1/6/131606472/7907033.pdfIn PDF document text
    • https://solawelosadi.weebly.com/uploads/1/3/1/8/131857655/rufifulupeboti.pdfIn PDF document text
    • https://kuwuxezito.weebly.com/uploads/1/3/6/0/136090431/3942833.pdfIn PDF document text
    • https://pudefita.weebly.com/uploads/1/3/4/4/134476078/2030380.pdfIn PDF document text
    • https://nuzewive.weebly.com/uploads/1/3/1/1/131164046/7232ea9.pdfIn PDF document text
    • https://pilitopamazi.weebly.com/uploads/1/3/4/3/134313639/bixudaliz_rititeke_lurikadoko.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a9750898-a066-404d-a796-54a2f5ad13bb.filesusr.com/ugd/60231a_387b780d6dbd4b92999826d4322a06f0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pasawe/fannie_mae_guidelines_for_manufactured_housing.pdfIn PDF document text
    • https://s3.amazonaws.com/safenalavojuwu/26200933152.pdfIn PDF document text
    • https://ecfc1f44-6648-4072-bff5-6ee4adcfbe4f.filesusr.com/ugd/e5a943_494b78657f73478ab5802e8b840f085f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gotenukevepunin/how_to_reset_cradlepoint_password.pdfIn PDF document text
    • https://s3.amazonaws.com/marimejerebo/rijofupimavamagi.pdfIn PDF document text
    • https://3633ae4e-9acc-45df-885e-1bfa1481cb44.filesusr.com/ugd/e73054_98adbdca7d3d44c69832ea00db4593da.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/donake/zokosisezofomobenulutepiz.pdfIn PDF document text
    • https://ad9e3d1f-bb22-46ca-892e-b6aa3325a756.filesusr.com/ugd/837d34_c357114999a9405e94adc64377a16ad6.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_off00011c58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C58 5652 bytes
SHA-256: 6755a3c59a7459f641643fa621e1ae9f6ef40bf3b81548146c14d8c4963720bc
font_01_sfnt_off00012f6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F6B 11688 bytes
SHA-256: 1ef635c24f99ea57ed0588b50a70e3517b92be0b3f46d62e4683d5a44dccb2c3