Malicious PDF — malware analysis report

Static analysis result for SHA-256 de0e03673cac552f…

MALICIOUS

PDF

74.1 KB Created: 2021-03-24 00:57:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: b0471961cf83544292cb86faa1efb979 SHA-1: 321758058a8c791d2b08d2477263610d5c9a2463 SHA-256: de0e03673cac552f2c0bdf4878a824ac38700a493fef29fbc32d2dda87c9e0f7
186 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 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://fokemale.ru/award?keyword=kruschke+bayesian+data+analysis+pdf PDF link annotation
    • http://cyberghost.store/list_of_lee_strobel_bookshm9ip.pdfIn PDF document text
    • https://vosanuxavuzom.weebly.com/uploads/1/3/6/0/136089669/monujebevek_susajowuziwujux_nigifinuzutofu_jejiremigelog.pdfIn PDF document text
    • http://buyfastedcircle.xyz/free_google_doc_calendar_templateite30.pdfIn PDF document text
    • http://lixidavek.22web.org/dofivajedutesab.pdfIn PDF document text
    • https://wubepifumemav.weebly.com/uploads/1/3/4/1/134109226/puxukemiguzodiv-jikawedilanif.pdfIn PDF document text
    • https://bovoladimuva.weebly.com/uploads/1/3/0/9/130970023/kimidufazaj.pdfIn PDF document text
    • https://pidodogifir.weebly.com/uploads/1/3/1/3/131383649/4663373.pdfIn PDF document text
    • https://tirilume.weebly.com/uploads/1/3/4/8/134886795/xaziwozafok.pdfIn PDF document text
    • http://lilisejujope.iblogger.org/84385919736.pdfIn PDF document text
    • http://naturfresh.space/baby_bullet_parts_canadaji28q.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/fejakixoweka/15565069189.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f648d36-7282-40ea-879b-b335cc5960e2/jusiki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9c6f853-d8f0-45ac-bc8e-8b2ea4d906fb/kobalt_wet_tile_cutter_parts.pdfIn PDF document text
    • https://34ec465e-51aa-4dba-9a8c-c05fcfb5ae84.filesusr.com/ugd/df15ee_3ffc0c51f43144cf8eee77aa23339d1c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vufuzewasi/psychology_chapter_13_quiz_answers.pdfIn PDF document text
    • http://kulixuvomewono.epizy.com/60118739696.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ab7e868-fee6-48cd-a9da-3c9cd82a2679/paritolitukokumuv.pdfIn PDF document text
    • https://2d2b1dae-c014-4902-97e6-c3f1d56915cd.filesusr.com/ugd/70e5f7_60dfd69fcc7b444aac194e2b8c99e8c7.pdf?index=trueIn PDF document text
    • http://tobekiginekafo.epizy.com/luvito.pdfIn PDF document text
    • https://s3.amazonaws.com/pazatuv/11028486581.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_off0000e5d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5D3 5520 bytes
SHA-256: 2340a175c7bc5950020bf2353ccf3e7c7c13462e4c9826db3679fb952ffcf1f0
font_01_sfnt_off0000f898.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF898 10164 bytes
SHA-256: f2655a641a788b1ba21b2f3a1c2223287865cef676c79a4f3b87725ce9eb4869

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