Malicious PDF — malware analysis report

Static analysis result for SHA-256 99372f207430926d…

MALICIOUS

PDF

78.4 KB Created: 2021-02-24 14:36:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 00d905c41ef48dfc63a24bfa5fce9fb0 SHA-1: ceb5aa539f2ef29dcd66326d0b7f048563b9145b SHA-256: 99372f207430926d68ef3fcff1a3ce93226614b47153f7a052a6534a1fcee47a
126 Risk Score

Malware Insights

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

The sample is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URIs, with a primary one pointing to 'https://maypoin.ru/wix?keyword=david+childers+real+estate', suggesting a phishing or credential harvesting attempt. The PDF structure also includes a link farm on disposable hosting, further supporting a malicious purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/wix?keyword=david+childers+real+estate PDF link annotation
    • http://damisidituwupo.iblogger.org/xopopukepafa.pdfIn PDF document text
    • https://cdn.sqhk.co/joremeve/PieT1Xs/90702177435.pdfIn PDF document text
    • http://erethiztzj.space/what_is_the_generic_structure_of_the_text_belowqd39o.pdfIn PDF document text
    • http://fuwenosod.iblogger.org/apple_airpods_microphone_android.pdfIn PDF document text
    • http://geniusenglish.space/dapilikubuampro.pdfIn PDF document text
    • http://govnososal.xyz/myaccountinglab_cost_accounting_answersrqxf8.pdfIn PDF document text
    • http://dvestideyli.xyz/invitation_to_the_life_span_3rd_editionc4hod.pdfIn PDF document text
    • http://sugewute.22web.org/tropic_of_cancer_latitude_and_longitude_coordinates.pdfIn PDF document text
    • http://theplafond.xyz/2016_ford_mustang_ecoboost_0-60oze2j.pdfIn PDF document text
    • https://cdn.sqhk.co/wujozuzewed/oiiMggd/biketoberfest_2020_welland.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fasilew.epizy.com/20055569381.pdfIn PDF document text
    • http://womunek.rf.gd/verb_1_2_3.pdfIn PDF document text
    • http://vilivarowazu.rf.gd/audio_editor_app_free.pdfIn PDF document text
    • http://nafabumawo.rf.gd/manefovorekaw.pdfIn PDF document text
    • http://wekidezeze.epizy.com/bypass_mega_limit.pdfIn PDF document text
    • http://sabozet.epizy.com/49420998042.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e558.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE558 6440 bytes
SHA-256: edf517a561ed5132c6c1d5718ac6ff9d870a00e6f43a91762fd168a2279cca75
font_01_sfnt_off0000f54e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF54E 5088 bytes
SHA-256: 22d0a5d604bc0614541649b449c454d9688cc12e48542a87b4345e2cc2d21a07
font_02_sfnt_off0001069c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1069C 11136 bytes
SHA-256: 59af074322ef06a1bfc566a491577472cfd7174b7cb5e9e8490e19b74a366f38