Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c163782958a80d2…

MALICIOUS

PDF

85.7 KB Created: 2021-03-27 10:17:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 7122944e3e4f644b0db30a785936e71c SHA-1: fde5a940f5281e19b47d3776eb346543f7eb200c SHA-256: 4c163782958a80d2d347713c82a22ef2c21a2bcbcf90e6546408382335ae7ff5
196 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including ClamAV and an ML classifier. It contains a large number of external links, many pointing to Weebly and other free hosting services, suggesting a link farm or SEO poisoning tactic. The primary URL, 'https://lozipotod.ru/award?keyword=israel+regardie+ceremonial+magic+pdf', appears to be an image lure linking to an SEO redirector for free downloads, a common phishing or malware distribution technique. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://lozipotod.ru/award?keyword=israel+regardie+ceremonial+magic+pdf PDF link annotation
    • https://nonafinawajag.weebly.com/uploads/1/3/4/3/134331790/semova.pdfIn PDF document text
    • https://rowexajezer.weebly.com/uploads/1/3/0/7/130776500/613e5f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453105/normal_600fd2b2673b0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421224/normal_5ffca4a935196.pdfIn PDF document text
    • http://jotuterob.22web.org/kodubowavefitavil.pdfIn PDF document text
    • https://gaduforijap.weebly.com/uploads/1/3/1/3/131381464/kilelenemonolele.pdfIn PDF document text
    • https://wetolobumusu.weebly.com/uploads/1/3/4/5/134579125/totemisab.pdfIn PDF document text
    • https://vatenesarawe.weebly.com/uploads/1/3/0/7/130775606/5010772.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/gazitif/adjectives_to_describe_a_raindrop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/567f63f7-8978-4d4a-90d2-f412be84a9a9/mirulekijafovodivapisawox.pdfIn PDF document text
    • https://s3.amazonaws.com/fumiposamisur/norukupomebifewefus.pdfIn PDF document text
    • https://s3.amazonaws.com/bevarolimesale/dudewenorabugux.pdfIn PDF document text
    • https://s3.amazonaws.com/gifiz/isomerism_chapter_class_11.pdfIn PDF document text
    • https://s3.amazonaws.com/xonaxevetaf/29799211051.pdfIn PDF document text
    • https://s3.amazonaws.com/nojemi/how_do_historians_analyze_information.pdfIn PDF document text
    • http://rilefup.epizy.com/bully_anniversary_edition_highly_compressed_10mb_android.pdfIn PDF document text
    • https://s3.amazonaws.com/temujonuwu/boiler_control_system_engineering.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c10f8db-5553-43c9-b790-e691ed6b9b89/harry_potter_2020_official_trailer_ita.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6962e87-0b03-44bf-a32f-589238dd443c/11630702717.pdfIn PDF document text
    • https://s3.amazonaws.com/latufenaw/how_to_crochet_a_blanket_with_chenille_chunky_yarn.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011546.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11546 5412 bytes
SHA-256: 325d737aae5d2f5c4f1f23ca293711686da2432c5a4a780a4bdea5658ea593ab
font_01_sfnt_off00012798.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12798 11332 bytes
SHA-256: 69965caef960b96a12765098def276869b73c4dd9d57eda690f492794fdce610

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