Malicious PDF — malware analysis report

Static analysis result for SHA-256 acdb9892e98fa73c…

MALICIOUS

PDF

86.8 KB Created: 2020-11-11 21:55:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 6c9835491b0bdb1046a467c34fedd91a SHA-1: 1731414ee111f7a1b003e77f2df1c0fe09a5e2c9 SHA-256: acdb9892e98fa73c76ad6a1c4a225776986055bc8c7f8a37601a3472aaec56de
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one specifically pointing to known malicious redirector infrastructure. The heuristic firings indicate a malicious redirector and a link farm, suggesting the primary purpose is to direct users to harmful sites. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://cctraff.ru/aws?utm_term=ondas+bidimensionales+pdf In PDF document text
    • https://bafovulik.weebly.com/uploads/1/3/1/0/131070506/04a0a722529b.pdfIn PDF document text
    • https://lolewifewo.weebly.com/uploads/1/3/4/7/134710585/fenew_vagufodoxiju.pdfIn PDF document text
    • https://wevinavuligi.weebly.com/uploads/1/3/4/5/134505150/3902752.pdfIn PDF document text
    • https://benofafixumiwif.weebly.com/uploads/1/3/4/4/134497886/1e178f5b4a2.pdfIn PDF document text
    • https://gejizataki.weebly.com/uploads/1/3/3/9/133997606/kebekadilogukulokaze.pdfIn PDF document text
    • https://jederatikepu.weebly.com/uploads/1/3/4/3/134370591/252762cd.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://s3.amazonaws.com/wokesabisevo/poulan_weed_eater_repair_manuals.pdfIn PDF document text
    • https://s3.amazonaws.com/sivanira/56439674296.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76577588-8175-4762-ac8e-b9532642203e/vetifurineguwix.pdfIn PDF document text
    • https://s3.amazonaws.com/vuliwisuwig/breath_of_the_wild_complete_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/viwoxuz/th475_gear_ratios.pdfIn PDF document text
    • https://s3.amazonaws.com/dojonuta/villager_pet_minecraft_mod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a0c204a-c6cd-4bf0-9445-327c04b7f0f7/motewiduxogugukuret.pdfIn PDF document text
    • https://s3.amazonaws.com/tarajix/a_sound_of_thunder_character_traits.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f018.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF018 4964 bytes
SHA-256: 95e53841d58bd5cf39e85d16d57a7d4c708865b4627a449c556aa99979d25284
font_01_sfnt_off000100d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100D6 12312 bytes
SHA-256: bae2660b52e8e99922c826b0b21ce781a4bc2b2c4ba76fffdfdcdea99815a49f
font_02_sfnt_off00012981.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12981 16084 bytes
SHA-256: 36e88bcac3f6702aa4285d6728274dd395a9fa8df4856bb2973d73c9e8333829
font_03_sfnt_off00013e3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E3F 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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