Malicious PDF — malware analysis report

Static analysis result for SHA-256 20884eed2a830492…

MALICIOUS

PDF

85.8 KB Created: 2021-03-09 15:54:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: b66a99b0e57be208e4b8b9c2979da92e SHA-1: b70308dd187f403494a8b1d4f072466b65137519 SHA-256: 20884eed2a8304929155330ec17e2c187cc90412e7feacb26cb9278ecd50d924
244 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on disposable domains or known malicious redirectors, indicating a link farm for SEO manipulation or phishing. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious content or phishing pages. No scripts were extracted, but the embedded URLs and heuristic firings point to a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/award?keyword=salesforce+admin+tutorial+for+beginners+pdf In PDF document text
    • https://cdn.sqhk.co/lojibuwe/IDhciI7/mysynchrony_car_care.pdfIn PDF document text
    • http://naturfresh.fun/azure_az_900_dumpsstcas.pdfIn PDF document text
    • https://cdn.sqhk.co/nebafori/beicCnY/rojed.pdfIn PDF document text
    • http://ruzagasaz.iblogger.org/92215330850.pdfIn PDF document text
    • https://cdn.sqhk.co/lisutovudaf/ihgMtNb/c64_emulator_macbook.pdfIn PDF document text
    • https://cdn.sqhk.co/mogizufofuj/dhggh3l/30077251201.pdfIn PDF document text
    • https://pexififowuru.weebly.com/uploads/1/3/4/7/134714045/9711886.pdfIn PDF document text
    • https://toviladul.weebly.com/uploads/1/3/0/7/130776498/pofuwuwavi.pdfIn PDF document text
    • https://rijagadufe.weebly.com/uploads/1/3/1/6/131606992/9301650.pdfIn PDF document text
    • http://ag-management.space/coloring_book_for_familyts1dw.pdfIn PDF document text
    • https://salexutoxor.weebly.com/uploads/1/3/4/7/134761189/1317722.pdfIn PDF document text
    • https://cdn.sqhk.co/guwaloxipete/Khicoie/reguguragosufulunido.pdfIn PDF document text
    • http://reduslimitaly-official.site/xiaomi_redmi_airdots_manual8en5p.pdfIn PDF document text
    • http://nashremont.site/kelley_day_koinucsg5.pdfIn PDF document text
    • http://reduslimitalia-official.site/gta_5_ps4_100_completion_guideqk0r7.pdfIn PDF document text
    • https://xaforegitada.weebly.com/uploads/1/3/1/4/131413040/8271686.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://toxodetu.rf.gd/film_minions_2015_subtitle_indonesia.pdfIn PDF document text
    • http://mavoxigu.rf.gd/texezosurobe.pdfIn PDF document text
    • http://jojofolarimema.epizy.com/brief_principles_of_macroeconomics_9th_edition_n._gregory_mankiw.pdfIn PDF document text
    • http://xakitidopapav.epizy.com/odd_and_even_numbers_worksheet_grade_3.pdfIn PDF document text
    • http://zawanaxakav.epizy.com/how_to_tell_if_something_is_more_soluble_in_acid_than_water.pdfIn PDF document text
    • http://bogisuxefitis.epizy.com/is_sig_better_than_glock.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_off00011203.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11203 5716 bytes
SHA-256: 5afb11759a206f9a3d7d04618b50ea77c007b375ae5ec458800159a3407ee07e
font_01_sfnt_off00012561.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12561 10704 bytes
SHA-256: a5dd15445a0cb005328ff1b575af28d7aaf24c306ef74000afe7a69f949711a9