Malicious PDF — malware analysis report

Static analysis result for SHA-256 464e2b765dc40abe…

MALICIOUS

PDF

69.7 KB Created: 2020-12-06 15:03:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: c26977aaed835a024d54d5c9328ebb12 SHA-1: b51aae996b89a2380dc3dd17bfb51fdfc3875451 SHA-256: 464e2b765dc40abe68f22cf041cd064ce1799e3dac82d80060b1e291ee96e377
214 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 and routes users through malicious redirector infrastructure. 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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffmen.ru/123?utm_term=gold%2527s+gym+290+exercise+bike+manual In PDF document text
    • https://pejilajapife.weebly.com/uploads/1/3/4/4/134477767/2773082.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465548/normal_5fa438abded5d.pdfIn PDF document text
    • https://daletutanedura.weebly.com/uploads/1/3/1/6/131636587/9680832.pdfIn PDF document text
    • https://bemuzulezevateb.weebly.com/uploads/1/3/4/4/134440878/pinizuju.pdfIn PDF document text
    • https://dopuxaponaxu.weebly.com/uploads/1/3/2/6/132695391/3214064.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/91e0135a-ec25-4efa-a573-32d46353bee7/balunujujafeva.pdfIn PDF document text
    • https://s3.amazonaws.com/dujepav/2018_year_calendar_printable.pdfIn PDF document text
    • https://s3.amazonaws.com/likerajatob/fodixodazafugodejanoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f778461f-a895-4d4d-bfb3-84b5e47d3bc2/xipurub.pdfIn PDF document text
    • https://s3.amazonaws.com/labitajaxatufib/jixixe.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e464ab79f442f229936f/t/5fca02d3e262c0159467819e/1607074515968/kadawukevudinazifinera.pdfIn PDF document text
    • https://s3.amazonaws.com/bevekizadoxuj/99614540356.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0cd11239b07229130be96/t/5fcc9e448a55f2188b72b861/1607245380484/38446746142.pdfIn PDF document text
    • https://s3.amazonaws.com/defujo/riperuniwu.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_off0000d1a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1A4 6128 bytes
SHA-256: 4e1201e317c3f49e4c6b1c5f0a923be9d6159f87df2878410ad569e1d8758fae
font_01_sfnt_off0000e679.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE679 10436 bytes
SHA-256: e5c3508af68cb98a9dc77d794fa1017cf1db5ed097ace488146c5e48ae03f0e6

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