Malicious PDF — malware analysis report

Static analysis result for SHA-256 2150913babdd98f2…

MALICIOUS

PDF

68.3 KB Created: 2020-12-28 20:46:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 47b118c3aaea28aea28c3eeb2ac91d05 SHA-1: 9dbf51d51358d196ea40ed0334c9ad6f2e973724 SHA-256: 2150913babdd98f204032145532ad25f7f0c18191f9fb6cd0f52a96e406df058
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded links that redirect to known malicious infrastructure, specifically identified as a phishing lure related to a '28 day boiled egg diet pdf'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the primary attack vector appears to be a malicious link within the document.

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
  • 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.
  • 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.
  • 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://gettraff.ru/aws?utm_term=28+day+boiled+egg+diet+pdf In PDF document text
    • https://cdn.sqhk.co/filomada/e0DXggz/87607257089.pdfIn PDF document text
    • https://cdn.sqhk.co/mavozopofug/ehdhb8o/ordinal_data_education_level.pdfIn PDF document text
    • https://cdn.sqhk.co/vuxesojogugu/this5dR/followers_skyrim_ranked.pdfIn PDF document text
    • https://cdn.sqhk.co/peluxisomex/hjKWKih/17129022701.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/jadere/fewanewukajoti.pdfIn PDF document text
    • https://s3.amazonaws.com/bakoloj/please_see_below_link.pdfIn PDF document text
    • https://s3.amazonaws.com/daniwodug/elements_of_ecology_9th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/sazomo/anydesk__apk.pdfIn PDF document text
    • https://s3.amazonaws.com/fejakixoweka/berepuwerukopogexugot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6412b1d6-51ef-41db-912d-fcc94460c902/2017_ap_biology_free_response_answers_question_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a11a26cf-6cf9-47fc-a80a-0b0d6c9d8166/33873656222.pdfIn PDF document text
    • https://s3.amazonaws.com/panalipolifod/solomon_asch_conformity_experiment.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_off0000ceac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEAC 5408 bytes
SHA-256: 50f891c0fb63393723c06012c1ed4f55ed30faaa800ac42c7e8327ba6c486a73
font_01_sfnt_off0000e130.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE130 10372 bytes
SHA-256: b0cf04133d207bbb801d76c4a090bb1061a815c629005d2f45e5861a3ecaaf2b

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