Malicious PDF — malware analysis report

Static analysis result for SHA-256 20d11c9aa05178fc…

MALICIOUS

PDF

152.9 KB Created: 2021-03-14 15:36:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 67ad0d53393fe63906b63b5e4494551b SHA-1: 19e7230f17281fa7caf291ec9d997b2e9cfb1167 SHA-256: 20d11c9aa05178fce6eda08259f717df7aefeb5bc241e7e6d4a880e8a64ddd2a
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one specifically pointing to 'fokemale.ru', indicating a potential phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a lure to a malicious site, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://fokemale.ru/infin?keyword=andhra+pradesh+political+map+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4421058/normal_60186ac57c326.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478148/normal_60355efb3fe98.pdfIn PDF document text
    • http://kutatit.getenjoyment.net/expert_card_technique.pdfIn PDF document text
    • http://kepuxom.mypressonline.com/pradhan_mantri_awas_yojana_application_form_in_marathi.pdfIn PDF document text
    • http://tumuduwaju.mypressonline.com/how_do_you_write_quadratic_equations_in_standard_form_examples.pdfIn PDF document text
    • http://rexonina.medianewsonline.com/autobiography_of_nelson_mandela_free_download.pdfIn PDF document text
    • http://pufivuziviv.mypressonline.com/53285713289.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385631/normal_5fff052719096.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463277/normal_6021c0b28eb7c.pdfIn PDF document text
    • http://mekujoviwe.mypressonline.com/what_is_the_second_warrior_cats_book.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423780/normal_6020ab87b2f48.pdfIn PDF document text
    • http://rusewigojubilon.mygamesonline.org/xuraxivu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://5a8aee2d-3d68-4c09-98ed-743c9c56d6fd.filesusr.com/ugd/460efe_cf94221a807a430cba193a3c61ce8a3f.pdf?index=trueIn PDF document text
    • http://jazikok.epizy.com/linux_ftp_bash_script_example.pdfIn PDF document text
    • https://44034db3-6cdd-4729-adf3-7ccd6afcf354.filesusr.com/ugd/9fe9cc_0302c10d265a4042a981361962129e7f.pdf?index=trueIn PDF document text
    • https://181f3bdf-810f-4c34-abb3-9f3362228cd6.filesusr.com/ugd/30415f_284c1780c6724eb4800a375e45e78fe9.pdf?index=trueIn PDF document text
    • https://c208ddc4-37ec-4cef-823d-79aeaa8cd68a.filesusr.com/ugd/d34c4d_617be23bf3204cc49feca6072a36222d.pdf?index=trueIn PDF document text
    • http://jutagejefutix.atwebpages.com/cerita_dongeng_dalam_bahasa_inggris.pdfIn PDF document text
    • http://jerokiguwipifo.rf.gd/votoxixibadibaxoxemuw.pdfIn PDF document text
    • http://retexibew.rf.gd/scientific_notation_chemistry_if8766_answer_key.pdfIn PDF document text
    • https://a0d2adcf-75bd-42a9-a42a-c23e1c6e9e1a.filesusr.com/ugd/85c99c_deca24b2d5bf4a97ae3caee8c8664523.pdf?index=trueIn PDF document text
    • https://15e12281-0fef-4bb1-b284-2b61ddec1698.filesusr.com/ugd/6c5390_d5bd099ae3394171a0a94bf3eed0a561.pdf?index=trueIn PDF document text
    • http://sojusenetuki.onlinewebshop.net/kuwato.pdfIn PDF document text
    • http://tininababa.rf.gd/bdo_witch_pre_awakening_guide.pdfIn PDF document text
    • http://forezepolutaju.onlinewebshop.net/wj-iv_achievement_subtest_descriptions.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001ff71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FF71 5384 bytes
SHA-256: 6756eb8b64b9e548d5401fc77fbf8a13ce5e07aaaf68ed49a03e0ae916ce4774
font_01_sfnt_off00021196.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21196 14224 bytes
SHA-256: 3b5861820ec1a2c3fed3e94ae3d456c9b387cb2fb77d0c01b7aa8d67d8228586
font_02_sfnt_off00024049.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24049 16164 bytes
SHA-256: e296a61d2d303e35be9e1a35631556663d2780498efa7e8f3867bf557f172fe6

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