Malicious PDF — malware analysis report

Static analysis result for SHA-256 51a4bd4408818496…

MALICIOUS

PDF

63.9 KB Created: 2020-12-15 03:12:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 533f757f3d4040c5051c8dae4ae0d4d1 SHA-1: 102aa8324dd045de7eaa69482412e7b5628ac440 SHA-256: 51a4bd4408818496b357c3b3cb51fbf9bab927beb9a2175ec0555e8fafc4b3b2
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://traffine.ru/strik?utm_term=ottlite+makeup+mirror PDF link annotation
    • https://gilijopagexoda.weebly.com/uploads/1/3/4/7/134713479/wutifabar_fubon_bofumemekofer_goxiwusironab.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc4e913f9866f3fd2edae8c/t/5fc9a9801a258d244fdaa09d/1607051648579/93191624002.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcfa6ab4c4d833b8bd8666/1606220398407/c_words_to_describe_someone_positively.pdfIn PDF document text
    • https://s3.amazonaws.com/purawuma/58073620961.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/390ddab6-ae0b-41da-b434-4f108211979f/rijafunopazarumumarin.pdfIn PDF document text
    • https://s3.amazonaws.com/jozetej/jajeran.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbceeb829c5e26690247f85/1606217407144/traktor_kontrol_s2.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4ffd688c99b6d37c18e02/t/5fca40f13ff94c207e14e473/1607090417936/coloring_adventure_finn_and_jake_investigations_3ds.pdfIn PDF document text
    • https://s3.amazonaws.com/zufaxepixiguxax/la_dictadura_jorge_baradit_gratis.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f8f692c50b1a1e77efcd/t/5fc12a695147b148045d8575/1606494826649/the_nucleus_of_an_atom_contains_at_least_one_proton.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4945f8ac-993b-448b-8876-bc038c4287e0/20652780087.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b45f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB45F 2880 bytes
SHA-256: ac64b8af80fcca1e0e594fba8a0f1e66fdecb42d42f059741c9e9f76428d751e
font_01_sfnt_off0000be9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE9E 4880 bytes
SHA-256: 6e0fe9b5bec6d8f9694321814de0aea02faf1cc08145adf22d8c0ea61445559c
font_02_sfnt_off0000cf1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF1A 10408 bytes
SHA-256: 0655de3626030ddefd906c159c38e6dbd3d8d32f84c326380ac74790678607ce

Open this report in the interactive analyzer, or submit your own file for analysis.