Malicious PDF — malware analysis report

Static analysis result for SHA-256 c91059c633a0018b…

MALICIOUS

PDF

72.3 KB Created: 2021-05-25 07:44:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 3edaeda542de608153164c40c807e2a7 SHA-1: 12bc13597bbcf361c697cd6f6287f6c687f4d3c5 SHA-256: c91059c633a0018b2a836a294dbd50eb759ad5831bf8fcf6ffc8658b712d7a9c
156 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 0.9997

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 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.
  • 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://nipisod.ru/strik?utm_term=dream+league+soccer+2015+mod+apk+hack+download+apkpure PDF link annotation
    • https://maxuvejalova.weebly.com/uploads/1/3/4/2/134265339/1b29c8f725d5.pdfIn PDF document text
    • https://bodonovovo.weebly.com/uploads/1/3/1/6/131607174/f2184ec1bd17d2.pdfIn PDF document text
    • https://figabufireso.weebly.com/uploads/1/3/4/4/134435363/94c076f4d9.pdfIn PDF document text
    • https://jokinurelebuvet.weebly.com/uploads/1/3/1/8/131856462/zemonawejinoxik.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/vabedafozo/xeveneziko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dadeee43-3250-48ed-a76a-06ecbccbb5f4/gofebubifav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20f68b91-65cb-47df-8e08-54531bd36177/lukajojixavelita.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6cf012cc-4dfd-4b5e-b614-0cb1bb67f7da/soleus_air_portable_air_conditioner_with_heater.pdfIn PDF document text
    • https://s3.amazonaws.com/xidazeze/true_freezer_t-49f_door_gasket.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a3a28a5-1d26-4ae9-a507-7793471a0b88/masevugurow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49b87dba-5bf6-4fee-974e-a7292672e96a/kupaxufurebekaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/230a71be-830f-4556-86d4-e4f139b6145e/boy_scout_councils_in_southern_california.pdfIn PDF document text
    • https://s3.amazonaws.com/fumiposamisur/jowok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a6584d7-fda4-4fb8-a41d-96d2b2f74551/54684824469.pdfIn PDF document text
    • https://s3.amazonaws.com/lejivugeleguwod/old_school_benin_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/107c0c76-597b-4da6-8cbd-bbf5a7210ab8/learn_arabic_language_in_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/titugome/roziwuvudixom.pdfIn PDF document text
    • https://s3.amazonaws.com/tidigudetefumof/calibre_ebook_user_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99de8983-cad3-43bf-9107-9035ea5c9add/lituregumu.pdfIn PDF document text
    • https://s3.amazonaws.com/mamukawaxatali/dailymotion_apk_without_ads.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_off0000db27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB27 6092 bytes
SHA-256: bd1ab1a64d501edd26ad288d5813079ca5b043981e6036ecababf31e80d7e186
font_01_sfnt_off0000efdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFDB 9772 bytes
SHA-256: b7600128a4cf064416565c6fcb120586916fb56bd66134c9845508591ce0950b

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