Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1ba118cf999b0ec…

MALICIOUS

PDF

81.2 KB Created: 2021-03-20 06:02:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 9b1825f1a4b0f4c33f9d077e626569cf SHA-1: 770669fce9dada5f658ad9cb4e6f05d5cfc0d749 SHA-256: e1ba118cf999b0ec3a0c9612c1ea85a5f8c37208f8c28ba45b9544dc29bb1d6d
66 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many of which point to disposable domains and are part of a link farm, suggesting a phishing or redirection campaign. The ML classifier strongly indicated maliciousness, and the presence of external URIs further supports a malicious intent to redirect the user. No scripts were extracted, but the overall structure and URL patterns are indicative of a social engineering lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • 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/123?utm_term=minority+scholarship+application+form+online PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4411493/normal_5fcebe25572d8.pdfIn PDF document text
    • http://kuxogajow.iblogger.org/lejoxediragewifixep.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495050/normal_602ea401bf38a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366340/normal_5fee3b2611c89.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481988/normal_6020bc67b8b9f.pdfIn PDF document text
    • http://lubukeki.22web.org/19300478208.pdfIn PDF document text
    • http://gapijet.scienceontheweb.net/tolopaderepemuzim.pdfIn PDF document text
    • http://fidekeleko.medianewsonline.com/how_to_pray_for_a_good_future_husband.pdfIn PDF document text
    • http://ginixotojaru.medianewsonline.com/acknowledgement_for_master_thesis.pdfIn PDF document text
    • http://zokidinodajives.getenjoyment.net/jozipego.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d74dc4f-1c6d-4c95-bfa8-ec5ba8465e26/na_living_clean_book.pdfIn PDF document text
    • http://liduzanakisuta.rf.gd/dns_320_firmware_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e68ee603-7163-4435-83a9-4489ddd1d281/7584621689.pdfIn PDF document text
    • http://gezuvemun.rf.gd/mebazuj.pdfIn PDF document text
    • http://zenowalu.rf.gd/safidunomamaliwekegevinol.pdfIn PDF document text
    • http://mafasegu.epizy.com/vojuvubusupiko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6d0725e-fcd5-48f5-b7fe-1c3b716916b8/pathfinder_life_science_books_free_download_part_1.pdfIn PDF document text
    • http://bekusisit.atwebpages.com/xeduxinerifebofonu.pdfIn PDF document text
    • http://gotozowixefe.epizy.com/old_egyptian_symbols_and_meanings.pdfIn PDF document text
    • http://womawujun.atwebpages.com/tepofisujituga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06202ae3-2b03-4514-8ac8-6a44f881d82e/gonulonugodam.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF5A 5364 bytes
SHA-256: d090d39e7d247b3b97b212430ddc61497d17cbab2d87d28b3bb84204e3a404a6
font_01_sfnt_off00010185.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10185 10952 bytes
SHA-256: 29578a12442393e909efa9e4959b1f4b07fa3ef2c402c3addbce54b52c41f09c
font_02_sfnt_off00012765.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12765 4056 bytes
SHA-256: 70b0896ca38f130111709bd68aba53d9097b858a2327efc34a40068f87427249

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