Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e8fb7d4afd20970…

MALICIOUS

PDF

84.5 KB Created: 2021-03-16 15:57:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: e1a211a63ba93587426adc921edb4d37 SHA-1: 973b93acac8e05da27ba0424621272c1a892ddc0 SHA-256: 1e8fb7d4afd20970b4bedc889140e42ae55053ecebaa6f824edf4301a3d9927b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://leonvi.ru/123?utm_term=whiten+sheets+with+baking+soda PDF link annotation
    • http://vagiburenumow.iblogger.org/21321980902.pdfIn PDF document text
    • http://dosujojori.22web.org/44470896074.pdfIn PDF document text
    • https://ralixuviromod.weebly.com/uploads/1/3/5/3/135345966/7762084.pdfIn PDF document text
    • https://wugedelujexot.weebly.com/uploads/1/3/1/4/131456191/zarez.pdfIn PDF document text
    • https://vomizovuzib.weebly.com/uploads/1/3/1/6/131637161/993b1c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393044/normal_602207d24e743.pdfIn PDF document text
    • https://dimebogative.weebly.com/uploads/1/3/1/4/131406505/nejuvatasuzu_goduxakadedi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389387/normal_5fcef76cc18ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500674/normal_60106dbd53571.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405437/normal_603c193430be0.pdfIn PDF document text
    • https://lepekogiba.weebly.com/uploads/1/3/1/6/131637498/56ceecce41.pdfIn PDF document text
    • http://pububasolemi.22web.org/free_wallpaper_for_android_nature.pdfIn PDF document text
    • http://pizetagudagunox.22web.org/how_to_ninja_air_fryer.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/faec99d7-a941-4890-8cab-4fd9e8e0180d/kumunazekugereke.pdfIn PDF document text
    • http://laxolivavaru.epizy.com/37047206553.pdfIn PDF document text
    • https://s3.amazonaws.com/mudurixo/active_directory_domain_services_basics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e5def2e-3301-4134-a7dd-d3991437f180/gibekatapepilulorik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60d165ea-4342-4ed4-b9c4-911e9b3745d5/cazadores_de_sombras_serie_temporada_2_capitulo_1_espaol_latino.pdfIn PDF document text
    • https://s3.amazonaws.com/bejexe/sananozadewoxut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/872c6626-79a9-4011-aba6-395f7cab8e4e/sazusemapudoxeduxamun.pdfIn PDF document text
    • http://folujas.epizy.com/jajizunuwi.pdfIn PDF document text
    • http://kowetomad.epizy.com/ontario_guide_to_effective_instruction_in_mathematics.pdfIn PDF document text
    • http://fewabawunidud.epizy.com/three_types_of_text_features.pdfIn PDF document text
    • http://suwetiwojiza.rf.gd/os_blackberry_z3_terbaru.pdfIn PDF document text
    • https://s3.amazonaws.com/zerepuzuze/path_of_exile_prefix_suffix_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd93a88d-50e4-46bd-852e-4f0cd29a49dd/what_would_cause_a_kenmore_dishwasher_not_to_drain.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_off00010c6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C6B 5268 bytes
SHA-256: ceaeb679fcc598769ed7ecfccd0db3ae6a9608f09ed9cb6a06d6ddd40d110d63
font_01_sfnt_off00011e6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E6F 10748 bytes
SHA-256: 50d698eb45c34b65f72b7a44300961a062709e51f491129283af73d0c99e8768