Malicious PDF — malware analysis report

Static analysis result for SHA-256 b64f7ff54fa3e9cf…

MALICIOUS

PDF

81.6 KB Created: 2021-03-01 21:37:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 63066e8e6b75e01fe0068e38a54d529e SHA-1: 6b9d0e6a2b12c621c401c44297eeaadcc9bc21b0 SHA-256: b64f7ff54fa3e9cfc3d8ae559dcea6374a2474152ae19f78de697380de329015
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains embedded links to known malicious redirector infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also flagged this PDF with high confidence. The document body, though heavily obfuscated, appears to be a lure related to a user manual, suggesting a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • 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 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://dafemum.ru/award?keyword=saeco+odea+go+plus+user+manual In PDF document text
    • http://xexapitanegis.getenjoyment.net/mipitajaki.pdfIn PDF document text
    • https://kawavugin.weebly.com/uploads/1/3/0/8/130874435/rinejuxesofigo_piwokuvufelugax_levusiv.pdfIn PDF document text
    • https://cdn.sqhk.co/xurakipigub/ghD1jeY/32851574898.pdfIn PDF document text
    • https://xudepafuvinuk.weebly.com/uploads/1/3/0/9/130969511/difevofazud.pdfIn PDF document text
    • http://mevilesiroxivo.iblogger.org/kickball_fielding_sheet.pdfIn PDF document text
    • https://mekupefaju.weebly.com/uploads/1/3/5/3/135316310/nabarig_fojakitoge_navozizixonojem.pdfIn PDF document text
    • https://bebamewikirebu.weebly.com/uploads/1/3/0/8/130874540/zekimusuzim_xakunavam_sopuzeb.pdfIn PDF document text
    • https://cdn.sqhk.co/jipodipotaj/gWFhcPV/wuravolukese.pdfIn PDF document text
    • http://idealica-italiauficiale.website/convertxtodvd_4_free_download_with_k2carx.pdfIn PDF document text
    • http://mumolazesinidix.getenjoyment.net/vizio_tv_use_bluetooth_headphones.pdfIn PDF document text
    • http://jetirirafu.iblogger.org/do_you_use_single_quotes_for_thoughts.pdfIn PDF document text
    • http://gagivukamuw.getenjoyment.net/tumudewixetovi.pdfIn PDF document text
    • https://cdn.sqhk.co/wanadujogo/b1whbij/robupewifipemawoxog.pdfIn PDF document text
    • http://kerutugizuxig.mygamesonline.org/calculus_by_earl_w_swokowski_6th_edition_free_download.pdfIn PDF document text
    • http://whysmall.space/bawosix7c6zh.pdfIn PDF document text
    • https://cdn.sqhk.co/pixorikibam/jjfSJhb/91418726985.pdfIn PDF document text
    • http://natgood.space/shot_clock_meaning_urbanyxadt.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/lorerexeg/51608910283.pdfIn PDF document text
    • http://magajavopisili.epizy.com/allama_iqbal_open_university_tutor_information_2018.pdfIn PDF document text
    • http://ropobowex.epizy.com/cause_and_effect_diagram_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/diwitapezu/italian_alphabet_chart.pdfIn PDF document text
    • https://s3.amazonaws.com/wikurixobelu/83928524945.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2C9 5252 bytes
SHA-256: 20461414123f57387d123b70731bbf6316d4560d123c8320f0864122c38dc530
font_01_sfnt_off0001046f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1046F 10720 bytes
SHA-256: d44597f24496e59365264bdf3159f628b47fc09d4403e0314590cf2613bce7c6
font_02_sfnt_off000128ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128AC 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c