Malicious PDF — malware analysis report

Static analysis result for SHA-256 acceb29868f05bae…

MALICIOUS

PDF

67.7 KB Created: 2021-03-23 23:53:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: e6020eea4525b7fedec5d5737615f933 SHA-1: 921b5acfd99dddf5f6c1af62c8bb20b60959bc50 SHA-256: acceb29868f05baea106076722282b5028c501c2c66bc3451311ad0c0e6d663a
176 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The embedded URL, disguised as a video song title, likely leads to a phishing or malware distribution site. The malformed stream length heuristic suggests an attempt to exploit PDF parsing vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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://maypoin.ru/123?utm_term=tumhe+hum+bahut+pyar+video+song PDF link annotation
    • https://cdn.sqhk.co/nenakowi/miejftA/8404296893.pdfIn PDF document text
    • https://cdn.sqhk.co/pepupiribojo/iiaYtUc/zimukaxuxor.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://2ddc7431-ff91-46e9-9708-195efd6cc195.filesusr.com/ugd/ffe0d3_1cd6c97e317347509a8a309104630e6b.pdf?index=trueIn PDF document text
    • http://kepijemimubu.rf.gd/mamegamiwewodigupewexax.pdfIn PDF document text
    • https://s3.amazonaws.com/dorulusof/sawusepiwod.pdfIn PDF document text
    • https://s3.amazonaws.com/piwanisaj/months_of_the_year_printables_for_preschool.pdfIn PDF document text
    • https://s3.amazonaws.com/xiwevitox/800526155.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4110795-be8d-4bff-a5fc-54ce3030352c/fidagudepigo.pdfIn PDF document text
    • https://s3.amazonaws.com/lupebesu/gothic_theme_in_wuthering_heights.pdfIn PDF document text
    • https://0f0532cb-4478-41f9-91a1-cf277c4732ec.filesusr.com/ugd/8acad3_60ad6eed512342bf89dbea3347d9b4aa.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sefipa/826320293.pdfIn PDF document text
    • https://9c43cb74-45e3-47de-9527-fda2e8336169.filesusr.com/ugd/af0aa9_6aae18e620e143fd86e302f1eac32bc6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/midaguvimabof/59034591464.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/592ad0e5-5734-4423-8a69-809b326bf371/nanavujuropuwuwoxowononev.pdfIn PDF document text
    • https://s3.amazonaws.com/lovetijif/safomusiladorojabowi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a17c545-47cc-4575-b333-6b2a144a1969/viginobejibumizotesufaze.pdfIn PDF document text
    • http://kudurefusi.epizy.com/82876646274.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5e84615-c7c7-4b3f-84e8-75a82ff70b3b/54064545618.pdfIn PDF document text
    • https://s3.amazonaws.com/juzowilipi/posafasujotevikerikulake.pdfIn PDF document text
    • https://s3.amazonaws.com/bulolimepol/go_for_no.pdfIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/piwokozukunejaf.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_off0000cd07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD07 5592 bytes
SHA-256: e95d8225e2c340c58a189998b77cefbf0d58adf1a6019a883e77586ffae0952c
font_01_sfnt_off0000dfe5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFE5 9948 bytes
SHA-256: c48c2f1e77d471bc46fb128b55a8a0aca101b38928d04b5508fdf5c34e2b5e74

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