Malicious PDF — malware analysis report

Static analysis result for SHA-256 e61e077796b4d27e…

MALICIOUS

PDF

77.1 KB Created: 2021-01-04 00:55:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 32d6a01e60c1a4a6ff71ab6a41f15b03 SHA-1: 702bc237582481b1c9ffda256c4dae3115692596 SHA-256: e61e077796b4d27e144ba0bf2b2d86f6b0f45d89650363560d80a4eb6463cac2
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with at least one identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' indicate a strong attempt to direct users to potentially harmful sites. The ML classifier and ClamAV detection further support the malicious nature of the file, classifying it as phishing malware.

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.
  • 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.
  • 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://ggtraff.ru/aws?utm_term=restricted+appraisal+report+example In PDF document text
    • https://rosuxemu.weebly.com/uploads/1/3/0/7/130776582/2ef90.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/4102594.pdfIn PDF document text
    • https://gamorajemusuro.weebly.com/uploads/1/3/4/3/134316050/pubunisenutejozukif.pdfIn PDF document text
    • https://cdn.sqhk.co/dubagelojuwe/gQhdjbq/voices_of_fire_choir.pdfIn PDF document text
    • https://sibolapitabake.weebly.com/uploads/1/3/4/4/134469628/takorobajididepu.pdfIn PDF document text
    • https://cdn.sqhk.co/letojeka/gIXgfih/didi_n_friends_lagu_baru_2018.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/43568b79-d867-461f-9bae-b5b9c93288bb/essential_hematology_5th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/ligole/classification_of_anorectal_malformation.pdfIn PDF document text
    • https://s3.amazonaws.com/wefadep/56861959598.pdfIn PDF document text
    • https://s3.amazonaws.com/bejexe/gusosufofupola.pdfIn PDF document text
    • https://s3.amazonaws.com/zerepuzuze/mirawinefusenigizowax.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_off0000e441.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE441 4976 bytes
SHA-256: e74e296a8c32ade569d62eb6ab2417a04283727658a5d0c94c6a534434a2aed2
font_01_sfnt_off0000f532.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF532 10632 bytes
SHA-256: d179a2e439103cfed59b347230b11db3625e6d0133fc66c387967d57413af9a9
font_02_sfnt_off00011952.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11952 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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