Malicious PDF — malware analysis report

Static analysis result for SHA-256 e49a0b00f2632300…

MALICIOUS

PDF

76.0 KB Created: 2021-03-23 22:03:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 44a350fbfe569185b95915eeff5f2ba2 SHA-1: ae75be3d497811fda016aa76e2cf7f8ba8fb4cde SHA-256: e49a0b00f2632300c761c82805616fc08c60217bec450e225ce0b3261d4e2770
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. The document contains a large number of external links, suggesting it is part of a link farm designed to drive traffic to malicious sites. While no scripts were explicitly extracted, the PDF structure and heuristic firings point towards malicious intent, likely involving the exploitation of PDF vulnerabilities or social engineering to redirect users to compromised URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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://jumiwimov.ru/123?utm_term=avery+address+labels+template+for+mac PDF link annotation
    • https://nonexivibofopuv.weebly.com/uploads/1/3/4/6/134603010/gufobexenobiditupel.pdfIn PDF document text
    • https://pamaxorakumi.weebly.com/uploads/1/3/4/0/134019068/siponemonebemubazip.pdfIn PDF document text
    • https://wibanakipose.weebly.com/uploads/1/3/4/3/134361509/nixitox_dunasuzemip.pdfIn PDF document text
    • https://remoruputudedux.weebly.com/uploads/1/3/4/0/134017090/lilovugaluduxaxovif.pdfIn PDF document text
    • https://bezubimuxidisa.weebly.com/uploads/1/3/1/4/131453869/bonaziz.pdfIn PDF document text
    • https://tererenigi.weebly.com/uploads/1/3/1/4/131405956/jeguxerezotufituwo.pdfIn PDF document text
    • http://lifolibi.sportsontheweb.net/which_weight_watchers_scale_is_best.pdfIn PDF document text
    • http://bukapim.mywebcommunity.org/18533349593.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://givetupazowo.onlinewebshop.net/56689490658.pdfIn PDF document text
    • http://luregaw.onlinewebshop.net/xuweparidapazunemari.pdfIn PDF document text
    • https://s3.amazonaws.com/fujadabez/xajinurisagagadim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0e85f38-0101-4b34-ad95-3ee3abf5b0d0/muvonovululanibedekuf.pdfIn PDF document text
    • https://s3.amazonaws.com/dozore/gem_trails_of_southern_california_braden.pdfIn PDF document text
    • https://s3.amazonaws.com/woneketelak/wosabopogozabota.pdfIn PDF document text
    • https://s3.amazonaws.com/fasudikek/bobcat_requirements_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf32edee-2b37-40f6-b30a-de9c02ad24e5/hp_officejet_pro_8600_plus_print_cartridge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64401aad-9cd8-465b-b259-e4a4804687bb/how_do_you_clean_the_filter_on_a_ge_potscrubber_dishwasher.pdfIn PDF document text
    • https://s3.amazonaws.com/rufonali/44672335319.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d531655-26e9-489c-87d2-fc66c41348c7/resea_de_romeo_y_julieta_libro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7a0bbd2-9b98-4d58-ac7d-df51f67f3b1c/66460596475.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_off0000ea2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA2A 5592 bytes
SHA-256: 21d2194c5fab86c824ca2c6a53745b9b8fe3a6a84c5a6383062c200a0ebcea4c
font_01_sfnt_off0000fd2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD2A 10936 bytes
SHA-256: 90816f7676884b054de918605ae69fcc02044e624a9dcd412ec409803eafe29d

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