Malicious PDF — malware analysis report

Static analysis result for SHA-256 87427f5ac5366808…

MALICIOUS

PDF

80.2 KB Created: 2021-02-21 17:28:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 406a4eb24c01311b904cd0458e500179 SHA-1: 41a4216b479de439edcc1a49ab775bf54c94242f SHA-256: 87427f5ac5366808f12fefcce372406c1e0cbde5c17bab8fd609be4f8feb5e03
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with at least one identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to 'Long john silver's grilled shrimp taco calories', suggesting a phishing or scam attempt. The presence of embedded URLs and the nature of the heuristics point towards an attempt to redirect the user to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://yafferge.ru/123?utm_term=long+john+silver%2527s+grilled+shrimp+taco+calories In PDF document text
    • https://cdn.sqhk.co/pozigafo/VOngdhf/bugibogureg.pdfIn PDF document text
    • https://cdn.sqhk.co/zanotunuzi/hdEhaCh/amazon_stock_today.pdfIn PDF document text
    • https://revegeworosopo.weebly.com/uploads/1/3/1/6/131637057/jigesuxod.pdfIn PDF document text
    • http://xulenegutuwovi.iblogger.org/95113300803.pdfIn PDF document text
    • https://bogigusojuvifu.weebly.com/uploads/1/3/4/3/134316749/7513073.pdfIn PDF document text
    • http://gufosizikok.22web.org/samsung_s5_emulator_android_studio.pdfIn PDF document text
    • https://zewabezasakaru.weebly.com/uploads/1/3/4/5/134593707/lorufexozoribeb.pdfIn PDF document text
    • https://tetabiga.weebly.com/uploads/1/3/4/0/134097499/bf2a07.pdfIn PDF document text
    • http://vuvopogawuxaxax.22web.org/36366728881.pdfIn PDF document text
    • http://remontlegko.info/fetozezinucgyjt.pdfIn PDF document text
    • https://cdn.sqhk.co/libibajuzumu/cOjajiF/planet_survival_animes_parecidos.pdfIn PDF document text
    • https://bivapere.weebly.com/uploads/1/3/4/6/134689139/8a83c3e13.pdfIn PDF document text
    • http://hookup671.site/44302923684r2fxo.pdfIn PDF document text
    • https://cdn.sqhk.co/zebimapajod/cxmXict/free_drag_and_drop_app_builder_software.pdfIn PDF document text
    • http://milansit.space/dimewujilobavegen3staf.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
    • http://melaworogafema.epizy.com/calories_in_arbys_turkey_bacon_wrap.pdfIn PDF document text
    • http://sokevojufepizi.rf.gd/how_to_apply_for_a_business_line_of_credit.pdfIn PDF document text
    • http://zezilometup.epizy.com/is_server_boosting_worth_it_reddit.pdfIn PDF document text
    • http://jirabumibami.epizy.com/nukedofanamobezijeko.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_off0000ea0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA0A 5384 bytes
SHA-256: 6e099453002d7928da9ae5b0d811058b9285d231b7c9fa4b6003e2c474c94ef2
font_01_sfnt_off0000fc43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC43 12104 bytes
SHA-256: 18ced41b6db3556c64786da7d186b14128be382698c66b80175c9f65871816e1
font_02_sfnt_off000124a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124A5 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

Open this report in the interactive analyzer, or submit your own file for analysis.