Malicious PDF — malware analysis report

Static analysis result for SHA-256 75cc0a16cf7fe9f5…

MALICIOUS

PDF

83.7 KB Created: 2021-05-06 19:56:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 0ea83b741ba17df6ce1d794eeb143f99 SHA-1: 856b86f328d0984db705dcefa33c23dc57b78b78 SHA-256: 75cc0a16cf7fe9f5e6678e7158562950c7f954bb4bf2eec14547bae67705a354
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 0.9993

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://fokemale.ru/strik?utm_term=coleman+powermate+4000+watt+generator+carburetor PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4465262/normal_5ffcc4e813d4b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464302/normal_602e32729f724.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421350/normal_602d3e1581263.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485157/normal_5ff69350a1d67.pdfIn PDF document text
    • https://cdn.sqhk.co/tamaladafa/cy6beie/bonilazarulegaram.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445877/normal_5fdfaaca2ab54.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483867/normal_604b4c8209ca1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379030/normal_600e6e028cba3.pdfIn PDF document text
    • https://cdn.sqhk.co/sekopanosesu/8jbgdkN/vulokutubesoluka.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462727/normal_605c24a59e076.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449788/normal_605b1249e2a91.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448330/normal_604f6b4754515.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454171/normal_605f4178d0c46.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410020/normal_600020afbb633.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://e824aeac-d22a-4b45-bb3c-17051d6ee04f.filesusr.com/ugd/de60da_bf5c319c50af4d9195b69e99a0661d2b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pibabopuduj/ascii_art_maker_pro_apk.pdfIn PDF document text
    • https://5b0e1d79-1acc-45ba-a965-31015372eee8.filesusr.com/ugd/67f5f7_1563b691a04143f6b53fdeec5a24a331.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tawosutosuxi/67595599928.pdfIn PDF document text
    • https://s3.amazonaws.com/nafibanefexex/15589232910.pdfIn PDF document text
    • https://s3.amazonaws.com/bezegoluzose/biddeford_electric_blanket_not_working.pdfIn PDF document text
    • https://s3.amazonaws.com/xisefowu/black_and_decker_food_processor_fp6010_parts.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5BA 5392 bytes
SHA-256: 7c92a69c47a04091e6dfacb152b47a12abd9fdfb703a015d9d21406d7aa934be
font_01_sfnt_off0000f814.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF814 11072 bytes
SHA-256: fce7ea656cb1e8f5134d3f220b72ea921b32e3c269813344816b8e86e2a7cebe
font_02_sfnt_off00011db2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DB2 16060 bytes
SHA-256: 9fce2e558c7eba93e9b4ba87b790c422cf9490aab73fe875614431ac3e7f116a
font_03_sfnt_off00013247.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13247 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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