Malicious PDF — malware analysis report

Static analysis result for SHA-256 19520778cc72305f…

MALICIOUS

PDF

76.4 KB Created: 2021-04-03 02:58:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: bda94c44db6ca0d70ea48b89753cb304 SHA-1: 4502002444356aeb8353236d2cbbbf8981ae395c SHA-256: 19520778cc72305f95c3d4d96ad38127ef7d8b0cbdb5b00927057ff26bbe6378
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9998

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 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://zajinet.ru/award?keyword=helicopter+automatic+flight+control+system+pdf PDF link annotation
    • http://fosonelotila.medianewsonline.com/beginner_english_vocabulary_exercises.pdfIn PDF document text
    • http://femonejigajape.mywebcommunity.org/82834065638.pdfIn PDF document text
    • https://cdn.sqhk.co/xajamenujo/jjUiKgc/bad_piggies_hd_mod_pc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365562/normal_6023aaa3f2197.pdfIn PDF document text
    • https://cdn.sqhk.co/teketerep/hYRjeid/hockey_meaning_in_telugu.pdfIn PDF document text
    • https://cdn.sqhk.co/kazaluxi/gdgjihl/foxivakijamajapewuvibema.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460045/normal_6041362a12b31.pdfIn PDF document text
    • http://tafuxasomup.getenjoyment.net/lojuzirologejar.pdfIn PDF document text
    • https://cdn.sqhk.co/zifeduwa/Hgiibji/douglas_county_oregon_police_scanner_codes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386605/normal_5fe6fdcfe49a1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xovolefewawex.atwebpages.com/que_hacer_antes_durante_y_despues_de_un_terremoto.pdfIn PDF document text
    • https://67dec473-0a9c-497c-80b1-62a4c84c5046.filesusr.com/ugd/0aab01_e2d667db9f424466aeb5b2702a4d8509.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/88b35efe-48ce-4812-8de4-47f634f07418/marlin_81_dl_stock.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7529b1ba-9e15-4c5e-9647-952ef07a497b/briggs_and_stratton_18hp_vanguard_engine_carburetor.pdfIn PDF document text
    • https://3bcdeb60-9876-4d14-bc0a-1dd1632c647c.filesusr.com/ugd/16a96a_39a65ca2c1da431a9a797fa16a437870.pdf?index=trueIn PDF document text
    • http://ruruwuvatokatal.onlinewebshop.net/bevapomujizolujeketiso.pdfIn PDF document text
    • http://sawesupunozigiv.atwebpages.com/74302843467.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f9855ba-6cc8-46f0-83b0-c4ca7f80ef86/90559495386.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7710403-29e8-4295-87f9-a896e31d9a28/the_way_of_the_peaceful_warrior_movie_free.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED58 5632 bytes
SHA-256: 524a91cbc876f4fa7f2428914380606f81fd0d6a6c816e54bfadccfff3f0e0ea
font_01_sfnt_off0001005d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1005D 10512 bytes
SHA-256: 3fbdf577da458dc6434acb6a311337b40ec41976532cf87879d9d5d692183578

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