Malicious PDF — malware analysis report

Static analysis result for SHA-256 109fe14628000532…

MALICIOUS

PDF

70.1 KB Created: 2021-04-07 14:27:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1555e6ff52c62b30fe2b88be2040f1d5 SHA-1: 751f6dd259513bb18e6a695a4806e5bb8fe33cb5 SHA-256: 109fe146280005323c81672497415b6fdadce607bf1845f87f6233a8f5003d4c
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to documents with numeric slugs, indicating a link farm designed to manipulate search engine results. One of the primary external links, 'https://lozipotod.ru/123?utm_term=husqvarna+430x+service+manual', is presented in a context suggesting it's a service manual, likely a lure for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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
  • 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://lozipotod.ru/123?utm_term=husqvarna+430x+service+manual
    • https://mivopolidenez.weebly.com/uploads/1/3/4/3/134349928/vikipoga.pdf
    • https://minajekefejuwow.weebly.com/uploads/1/3/0/7/130776819/e05348676.pdf
    • http://gapilojazixo.getenjoyment.net/the_routledge_concise_history_of_science_fiction.pdf
    • https://static.s123-cdn-static.com/uploads/4500200/normal_5ff622eea977d.pdf
    • http://tigibisolefora.mygamesonline.org/36654626401.pdf
    • https://static.s123-cdn-static.com/uploads/4460048/normal_60031c5e9ca7a.pdf
    • https://static.s123-cdn-static.com/uploads/4365525/normal_5ff252841347f.pdf
    • https://cdn-cms.f-static.net/uploads/4409614/normal_605a715cc62e7.pdf
    • https://lovarewido.weebly.com/uploads/1/3/4/3/134322716/8d5f1b.pdf
    • http://sakepugikunon.mypressonline.com/22531358042.pdf
    • https://gagivoxiw.weebly.com/uploads/1/3/5/9/135991060/zamilitazigig.pdf
    • http://mobufuwiwid.medianewsonline.com/all_information_about_computer.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/dazutun/37609866816.pdf
    • http://bolirazebaf.myartsonline.com/how_to_find_samsung_tv_code_for_universal_remote.pdf
    • https://s3.amazonaws.com/dubiditiginowo/69197271226.pdf
    • https://s3.amazonaws.com/kitakilesa/wekidubaboge.pdf
    • https://s3.amazonaws.com/visagogijulep/63296699619.pdf
    • https://s3.amazonaws.com/rizijubovapuk/hampton_bay_ceiling_fan_remote_parts.pdf
    • https://s3.amazonaws.com/zodererezuzuxi/manual_lawn_aerator_home_depot.pdf
    • https://s3.amazonaws.com/widuxade/10543353585.pdf
    • https://s3.amazonaws.com/palikuvexake/36140876178.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_off0000d21d.bin
4baf071a8ef688fb57baabb7b736b3c2912555ad1b7081b75d8e47a7791cff0a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD21D 5556 bytes
font_01_sfnt_off0000e4fb.bin
15bd7f91906fac9b5dbd925ed4db0225312924ec175aff4db8eb1916677b41e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE4FB 10956 bytes

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