Malicious PDF — malware analysis report

Static analysis result for SHA-256 0704651274a700e3…

MALICIOUS

PDF

74.0 KB Created: 2021-05-20 12:55:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 270ad1b1f79c08e788bd85a3339f20bb SHA-1: b586144697a9590ff12f82883eb03b9b988319a5 SHA-256: 0704651274a700e3a308f9137baf7cfaec4b8e1015177750266a2f5c5e35ebd9
196 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to a redirector URL (https://dugedepap.ru/strik?utm_term=la+grande+tribulation+dur%25C3%25A9e). This behavior is indicative of a link farm or phishing lure designed to drive traffic to malicious sites. The ClamAV detection and ML classifier further support its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://dugedepap.ru/strik?utm_term=la+grande+tribulation+dur%25C3%25A9e PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4451021/normal_5fe91021ef8eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369781/normal_5fd5f2e09390f.pdfIn PDF document text
    • https://bunevozobete.weebly.com/uploads/1/3/4/7/134714888/079fd20de09.pdfIn PDF document text
    • https://selokifasafu.weebly.com/uploads/1/3/4/3/134383977/5a635.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479240/normal_5ff4eb789fe83.pdfIn PDF document text
    • https://janirakuvofubej.weebly.com/uploads/1/3/4/7/134734148/469424.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369506/normal_602c693ba6b2c.pdfIn PDF document text
    • https://jodowofimen.weebly.com/uploads/1/3/5/3/135330599/d4a42a7242a14.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384483/normal_60117a22a2cbb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bolovopizonuki/juwotujet.pdfIn PDF document text
    • https://s3.amazonaws.com/zoluwivebiro/1001466849.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78903f32-3a9e-4eb1-bc74-adf7e923e69c/babybjorn_baby_carrier_one_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/lupebesu/pubepinuxizelexixijawewe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7de6992-6d67-486c-a4b7-9673b5b13a38/joy_luck_club_book_club_questions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/788acd3d-9c7c-4536-a83a-89a6adf9cdac/world_politics_trend_and_transformation_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/tetofamuxulil/85403867776.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8351b1ce-dd29-4089-ac8c-e8c0b876d49e/67968147218.pdfIn PDF document text
    • https://s3.amazonaws.com/zikeko/chevy_colorado_diesel_performance_chip.pdfIn PDF document text
    • https://s3.amazonaws.com/zalisujezajaje/the_hiding_place_betsie_quotes.pdfIn PDF document text
    • https://s3.amazonaws.com/voxipanovigepiv/adosphere_1_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwotarotavuz/haier_5000_btu_air_conditioner_walmart.pdfIn PDF document text
    • https://s3.amazonaws.com/penale/sql_server_management_studio_old_version.pdfIn PDF document text
    • https://s3.amazonaws.com/jolozidabi/sepogu.pdfIn PDF document text
    • https://s3.amazonaws.com/wupiwupiwot/kikuvewinebakabadaxe.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_off0000e3da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3DA 5036 bytes
SHA-256: 1b6cff78dc136903b3304d959793dcdcc079594fe3b664b46fda1bc593f80ce7
font_01_sfnt_off0000f4c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4C6 10656 bytes
SHA-256: f7862a16a01629f653c5310a1a705c1a47aaeb25337485bd9313c4658bd5509a