Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcdadff2dbd9b686…

MALICIOUS

PDF

71.9 KB Created: 2021-06-10 17:09:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: a9def2a57c74bb907e4aba22dcdb1c5c SHA-1: e708565a0aaea195de5968e8b2939c539ae1f270 SHA-256: bcdadff2dbd9b6867893c7fa5ba23a1566737511b41f3c4f857eda69e3f0315f
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, many of which point to disposable hosting services and appear to be part of a link farm. The primary URL, 'https://wastran.ru/pbw?utm_term=download+the+adventures+of+tintin', suggests a social engineering lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://wastran.ru/pbw?utm_term=download+the+adventures+of+tintin PDF link annotation
    • https://fujareke.weebly.com/uploads/1/3/5/3/135391043/793fe25fb534.pdfIn PDF document text
    • https://xogedanubukojoj.weebly.com/uploads/1/3/4/4/134491538/8416752.pdfIn PDF document text
    • https://gezameluloxeg.weebly.com/uploads/1/3/5/3/135393377/vanemuzidebifev.pdfIn PDF document text
    • https://juwaxevepatasi.weebly.com/uploads/1/3/0/8/130874094/fazoduf.pdfIn PDF document text
    • https://vamexerop.weebly.com/uploads/1/3/6/0/136085595/senepamofajigu.pdfIn PDF document text
    • https://sikapekit.weebly.com/uploads/1/3/5/3/135317012/8bdaa9992.pdfIn PDF document text
    • https://paduxadoduxim.weebly.com/uploads/1/3/0/7/130775016/14406df5dbf.pdfIn PDF document text
    • https://tafejopaz.weebly.com/uploads/1/3/4/0/134012310/ff13ac.pdfIn PDF document text
    • https://latavulepa.weebly.com/uploads/1/3/4/4/134461708/rilibe.pdfIn PDF document text
    • https://gidipefodato.weebly.com/uploads/1/3/5/3/135348522/nuxomabaxoja.pdfIn PDF document text
    • https://lovuvolix.weebly.com/uploads/1/3/4/8/134866108/xigagosol.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/17eb2079-a59e-41d9-a33d-68c339788582/41488279479.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1cc1e6aa-fdf7-4419-8729-83e71e046309/digital_image_processing_gonzalez_4th_edition_amazon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ab6116e-7ce7-416a-b0e6-0cb51f4dd04f/5977824401.pdfIn PDF document text
    • http://vimadutukad.pbworks.com/f/21407765773.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28acd87b-ace8-401c-ba61-246cb198b478/diono_radian_rxt_car_seat_lady.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd73e54a-ccd8-497c-80e6-4453b04a946f/acer_aspire_e_15_manuale_italiano.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1010917e-0c42-4cc1-b0c0-1b5fb755134d/23_minutes_in_hell_by_bill_wiese.pdfIn PDF document text
    • http://kipizasuzeda.pbworks.com/w/file/fetch/144737682/8_ball_pool_hack_for_ipad.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_off0000da89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA89 5144 bytes
SHA-256: ff79d5894e7555ac09a9b5e6273a2ab22da0885627a0e063b84ee4c4c36850a1
font_01_sfnt_off0000ec22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC22 11104 bytes
SHA-256: d8c500ddb6eabfd907211364be04938422c43f684a9d58df9a281d630b51a749

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