Malicious PDF — malware analysis report

Static analysis result for SHA-256 e30ee72631c87890…

MALICIOUS

PDF

70.0 KB Created: 2020-12-06 01:56:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 839821df7e9266d4bc9f397408c0858a SHA-1: e54d6d1cf586d0a98eb95b6201825b16b426c0a4 SHA-256: e30ee72631c87890bf9b19ced23d2defc544a9f484294b6df9c93242849f84eb
214 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external websites, including a known malicious redirector. The document body, though heavily obfuscated, suggests a lure related to music beats. The presence of numerous links and a malicious redirector indicates an attempt to lead the user to a compromised or malicious site, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://cctraff.ru/aws?utm_term=hot+hip+hop+instrumental+beats
    • https://sotufipepu.weebly.com/uploads/1/3/4/5/134595957/jomafu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/xuvamuba/18235948649.pdf
    • https://uploads.strikinglycdn.com/files/a3508236-b383-4b1e-ad04-b9edba315086/80183752185.pdf
    • https://uploads.strikinglycdn.com/files/cb3aa436-24d1-4721-8112-e2cbd9601c20/tf2_item_drops.pdf
    • https://uploads.strikinglycdn.com/files/981330c3-0176-4167-91ce-b94ee3d74495/29391546960.pdf
    • https://uploads.strikinglycdn.com/files/ff2c6a55-569e-40f9-9282-a1a1e2045581/kuzokozenupupuwen.pdf
    • https://uploads.strikinglycdn.com/files/2ea45a83-3f20-4661-8c56-1b0a55776add/76979007783.pdf
    • https://uploads.strikinglycdn.com/files/344bcd9e-e34e-4446-9f9d-1b93202de4cb/zefikidesusuragum.pdf
    • https://s3.amazonaws.com/zobuwubedak/assembly_language_for_x86_processors_7th_edition_solutions.pdf
    • https://uploads.strikinglycdn.com/files/a217a4d5-239a-4a3b-aaeb-95f45256ee09/66392831070.pdf
    • https://uploads.strikinglycdn.com/files/7437d075-1c9b-4120-9220-11151f9db31f/bixovipowanopijodowuzowa.pdf
    • https://uploads.strikinglycdn.com/files/835804b7-ebb7-4d79-b003-185aa30222e5/bipetadijurudikipagatufo.pdf
    • https://uploads.strikinglycdn.com/files/785c8478-0702-4b36-bf86-59653e757120/10349283476.pdf
    • https://uploads.strikinglycdn.com/files/f609ffec-6c19-4552-b4a1-57f64fba15af/21893368145.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d754.bin
a5e677e86569e580352572bf521feea4e942cbfe4eafdc45aba7f660cf704a48		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD754 5160 bytes
font_01_sfnt_off0000e8a8.bin
a1a53ec2134ced09ecc98fd1bb59fa12ad2322058a14fded179f547a8c6b750e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE8A8 10244 bytes

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