Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0e7d5d0b44346d2…

MALICIOUS

PDF

74.5 KB Created: 2021-03-23 22:53:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: b7a576eca59ba6e9e268985bacf7a1a1 SHA-1: 85756227f26b0e3b71b5820bdb69c60b0e164d65 SHA-256: c0e7d5d0b44346d2211b75f449fdfc915cacf2c54677eff77d638a961c09e586
126 Risk Score

Malware Insights

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

The PDF document was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with at least one pointing to a suspicious domain ('golowaki.ru'), suggesting it functions as a link farm for phishing or malware distribution. The presence of PDF-specific heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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://golowaki.ru/wix?keyword=merfolk+5e+language PDF link annotation
    • https://cdn.sqhk.co/botonerepap/idGf9gf/ultimate_robot_fighting_download.pdfIn PDF document text
    • http://jepewadagamer.scienceontheweb.net/27216429013.pdfIn PDF document text
    • https://cdn.sqhk.co/goluxewimabu/cjfLiaf/there_you_go_johnny_gill_wiki.pdfIn PDF document text
    • http://kedugobepuged.mywebcommunity.org/gomiwesebegezijudewum.pdfIn PDF document text
    • https://cdn.sqhk.co/lokiwejawe/5Gnjjgi/77722182858.pdfIn PDF document text
    • https://cdn.sqhk.co/kubepugemaki/shfEjgY/duetto_movie_netflix.pdfIn PDF document text
    • http://vuxilenusip.mypressonline.com/22494089533.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ed8bc375-cd54-49ab-9ddb-988cb5b2fc3d.filesusr.com/ugd/3f3824_f7985cd61a0741309545178d9878a66a.pdf?index=trueIn PDF document text
    • http://sawesupunozigiv.atwebpages.com/auto_ingles_total.pdfIn PDF document text
    • https://1d78cdce-0032-4a75-b9f1-030f6b068c24.filesusr.com/ugd/32f660_39aa5ec23c29431a9c16a097746e5856.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/006c7734-c6d7-4cfd-8bf8-71abb03403b9/will_be_review_or_reviewed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/502d9beb-02ba-47f0-bb56-bca669d1d65e/mejekevuke.pdfIn PDF document text
    • https://s3.amazonaws.com/gotenukevepunin/75156443340.pdfIn PDF document text
    • https://6e345194-e688-4037-aa24-2ff230a16836.filesusr.com/ugd/ce9fe1_ef72c40649e74175a62b871723348fe2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/78a14c8c-0601-4af5-af98-3091d3e3b066/61421126683.pdfIn PDF document text
    • https://s3.amazonaws.com/zikeko/casement_cloth_bed_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/bezegoluzose/linux_backtrack_6_iso.pdfIn PDF document text
    • http://tojugejuxutusur.epizy.com/comptia_a_220-901_and_220-902_exam_cram_download.pdfIn PDF document text
    • https://1c437d0a-cccb-4a8a-93f1-39e0b5126915.filesusr.com/ugd/b91566_e476b378d1fc4f04a996ecb52a7117d7.pdf?index=trueIn PDF document text
    • http://munomofeduvuwe.rf.gd/assessing_marketing_information_needs_definition.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_off0000e8c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8C1 4948 bytes
SHA-256: d393fea6748ec8d79545edd6b90a0a8292b066ec5bf120a0d6ea899cb3437b22
font_01_sfnt_off0000f9bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9BC 10316 bytes
SHA-256: d9bfef636cc20d7c9ca61b1c4758092bd88fc270894436aa7d9f1ecfaa5e456f

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