Malicious PDF — malware analysis report

Static analysis result for SHA-256 f132845432d42863…

MALICIOUS

PDF

83.7 KB Created: 2021-03-22 18:46:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ee62e05e694272b2ca92d80650a98d76 SHA-1: d92a9b5fd64017f4f15e87e4b97bd1e28cbf994c SHA-256: f132845432d4286302b30dc3b29b12a47306f48d20f03543f946f6eecc70d858
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 0.9998

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=anticancer+drugs+presentation+pdf PDF link annotation
    • http://tcerkovniekupola.space/time_clocking_policyoourr.pdfIn PDF document text
    • https://cdn.sqhk.co/dujejigin/zjgufii/azure_iot_platform_architecture.pdfIn PDF document text
    • https://cdn.sqhk.co/pesofesidoke/btJhcNi/musasifipinanowelizubemuw.pdfIn PDF document text
    • http://trastenmyqort.online/213799198791tkm1.pdfIn PDF document text
    • https://cdn.sqhk.co/vonezositixi/c6gjrx9/diep._io_wiki_bosses.pdfIn PDF document text
    • https://cdn.sqhk.co/fugovigul/bl4jhih/65760855312.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/dc1058b1-b102-4d9c-9687-bed03c6749b4/the_wait_book_free_download.pdfIn PDF document text
    • https://75edee45-cd08-43cb-a752-0c33e5c2343f.filesusr.com/ugd/a7c173_da5dfc290d0d4f4e8becf9ec78305f4d.pdf?index=trueIn PDF document text
    • http://kupavojos.epizy.com/como_hacer_estudio_de_familia_numerosa.pdfIn PDF document text
    • http://xepujeroniwazip.epizy.com/fifixajafutojagiriwe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/860b54e3-c790-4a97-ae72-36c7d2d340b8/pigukope.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/825f0ccf-f5d9-4ab0-8ecc-a2efd7435402/smith_and_wesson_standard_catalog.pdfIn PDF document text
    • https://0aed7b51-d02b-4864-a6bb-b478bb809667.filesusr.com/ugd/fbdaab_9a01c713707c46d7a0e10353aa0f59f8.pdf?index=trueIn PDF document text
    • http://meraxemuvixise.epizy.com/bible_study_guide_books.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7e71cc8-ff9e-48c6-9513-b2ede34fdb3e/how_to_make_basic_waffle_mix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78a40cd2-201b-46a6-8450-5408cf258630/fonuzupomokudarukalo.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010bd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BD4 5280 bytes
SHA-256: 0946c9f660fd33950daa74c896a9888135e720b32cefee2649116efd368a48d0
font_01_sfnt_off00011dde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DDE 10572 bytes
SHA-256: 318cd4255d0dfb559f01c854cbc410fa09df465c586a65852241c3200dac302e

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