Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc232364fd1435ab…

MALICIOUS

PDF

80.7 KB Created: 2021-03-28 10:04:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: db25a81c9035d0f15993139eaa147725 SHA-1: a91f80f51fe1c2b6c8de8194cecf1fc60bd7ee2c SHA-256: cc232364fd1435ab004fee09256ac62f4cf2d270e2492f27f1a26e368c491837
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, characteristic of a link farm or SEO spam campaign. The heuristic 'PDF_SEO_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly indicate this malicious intent. The embedded URL 'https://pelibifir.ru/123?utm_term=broadcaster+bouquet+trai+pdf' suggests a lure related to broadcast bouquets, aiming to redirect users to potentially harmful content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • 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.
  • 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://pelibifir.ru/123?utm_term=broadcaster+bouquet+trai+pdf PDF link annotation
    • https://cdn.sqhk.co/goxobuve/Hgh3iir/monkey_style_kung_fu_basics.pdfIn PDF document text
    • http://pugorot.mygamesonline.org/is_the_lg_stylo_a_good_phone.pdfIn PDF document text
    • https://cdn.sqhk.co/nuvurero/vSJo1hf/42036592484.pdfIn PDF document text
    • https://cdn.sqhk.co/xoxifopu/mTibFAW/ice_cream_cake_delivery_malaysia.pdfIn PDF document text
    • https://cdn.sqhk.co/mokavokaven/bji5ijj/aprilaire_700_template_dimensions.pdfIn PDF document text
    • http://zumewidife.mygamesonline.org/best_thriller_novels_of_all_time.pdfIn PDF document text
    • http://wejuzofibab.medianewsonline.com/all_formula_of_math_class_10.pdfIn PDF document text
    • https://cdn.sqhk.co/fuluzagile/Vmji5ih/social_media_marketing_planner.pdfIn PDF document text
    • http://fuvisetitisenon.mypressonline.com/silazusirer.pdfIn PDF document text
    • https://cdn.sqhk.co/mojuzizimu/JUigijt/524651930.pdfIn PDF document text
    • https://cdn.sqhk.co/jupujezaxa/Hkotiaj/6796748339.pdfIn PDF document text
    • https://cdn.sqhk.co/nojebimit/exihxBw/ripapijemaga.pdfIn PDF document text
    • http://lamisorosasam.mywebcommunity.org/environmental_pollution_control_engineering_c_s_rao.pdfIn PDF document text
    • http://paxosij.mygamesonline.org/data_analysis_software.pdfIn PDF document text
    • http://vizilirudigub.getenjoyment.net/wasaxomapapowawawepo.pdfIn PDF document text
    • https://cdn.sqhk.co/wovenebi/iigfVib/free_domain_authority_checker_tools.pdfIn PDF document text
    • https://cdn.sqhk.co/mofokamibe/Fggg9ij/second_hand_clothes_wholesale_in_kenya.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tagijonegularol.myartsonline.com/83127422347.pdfIn PDF document text
    • https://938a05da-450f-421e-a59b-0448473a402a.filesusr.com/ugd/cb5dea_012b361b50b448f384e11858b1289e40.pdf?index=trueIn PDF document text
    • https://e24ff460-1725-4b9d-a7de-f8438c38fea0.filesusr.com/ugd/366850_6d82d4d707694027aeda02a3b6f8b53a.pdf?index=trueIn PDF document text
    • https://ad9f1622-e3b7-49db-bfef-326c48fb2104.filesusr.com/ugd/a467d2_4d8443224cff427aa1084faa31475b6b.pdf?index=trueIn PDF document text
    • https://46d16763-6c5f-4e19-aa2c-3f4071fcbec2.filesusr.com/ugd/26f730_56d769e482d24354884d9f2de6adb177.pdf?index=trueIn PDF document text
    • https://43dda2ad-fadc-418c-a2d5-4b96cca2ed60.filesusr.com/ugd/6eca9c_f7868aea0f604e4191574c6e68dd864c.pdf?index=trueIn PDF document text
    • http://maretubozewugi.myartsonline.com/believe_polar_express_satb.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e568.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE568 5432 bytes
SHA-256: 1c146e9f2184cc2ebc801dbea703b1bd5c5281aa844cbd9cd392d80b6695959f
font_01_sfnt_off0000f7e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7E7 10756 bytes
SHA-256: 8c499b5bd99c62e6daf27479a92f87db21838511cd2cb2c39be61db2096aca4a
font_02_sfnt_off00011cfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CFD 16468 bytes
SHA-256: cfcd05a0c4c29650fb289d3b9d3ed26e082e8f5a1b5b712b0509a6c70894056a

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