Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcb1bea4813f2938…

MALICIOUS

PDF

72.2 KB Created: 2021-01-12 12:20:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 8e88d0782953af8c08be3911e272c798 SHA-1: be5c0ef32c49b366baa00df5a5c489002b6680f9 SHA-256: fcb1bea4813f29387a733e1effb7cb2c709e3b024bc37c82a75c452904d00b70
214 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with at least one pointing to a known malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. The presence of numerous external links suggests an attempt to direct users to potentially harmful content.

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://traffmen.ru/aws?utm_term=delly+belly+full+movie++300mb In PDF document text
    • https://static.s123-cdn-static.com/uploads/4369657/normal_5fee8924a6ab1.pdfIn PDF document text
    • https://site-1176492.mozfiles.com/files/1176492/ninodanasizinatemiporot.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389804/normal_5f98cf4bbc612.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370055/normal_5f9610e605373.pdfIn PDF document text
    • https://gimiduti.weebly.com/uploads/1/3/4/7/134711596/5503658.pdfIn PDF document text
    • https://jufavufopu.weebly.com/uploads/1/3/4/3/134340263/4f004b08ad6832.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417207/normal_5fa103088829b.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/vce_to_converter_mac.pdfIn PDF document text
    • https://s3.amazonaws.com/zowejunef/27692550089.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/introduction_to_bearings_maths.pdfIn PDF document text
    • https://s3.amazonaws.com/jewizopukuni/89483924125.pdfIn PDF document text
    • https://s3.amazonaws.com/wovugi/56254430342.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_off0000d60d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD60D 5036 bytes
SHA-256: 802f6e820169feb0ae829a9f448c54df62dc562beca4856850c78194bba9ce00
font_01_sfnt_off0000e740.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE740 15236 bytes
SHA-256: b20484c22eb79a18db41412316f9357ef5419c0dbb6e9e5fe7730bcd2e33e76b

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