Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a602c5ed7f9e4ca…

MALICIOUS

PDF

84.7 KB Created: 2021-03-31 04:15:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 7414f91adcf93ad08fd1eaaf04c82e01 SHA-1: da77a40e87122e601db56246af99629115253bcf SHA-256: 1a602c5ed7f9e4ca67be3ee12104dd639b3b5556f6fb003c0569136af96bb065
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • 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://soxebez.ru/strik?utm_term=2005+honda+civic+hybrid+owners+manual PDF link annotation
    • http://securityverifiedservices.com/aprender_marketing_digital_gratisncni9.pdfIn PDF document text
    • http://smcjd.com/hp_officejet_pro_l7680_ink_cartridgesatd7t.pdfIn PDF document text
    • http://nuveclovet.xyz/melogodinijojixasevoniny4td9.pdfIn PDF document text
    • https://lutomired.weebly.com/uploads/1/3/5/3/135316507/dejan_wojagadi_winageret.pdfIn PDF document text
    • http://fakts.design/biochemistry_8th_edition_berg423nh.pdfIn PDF document text
    • http://molefomisapeput.mypressonline.com/8149915003.pdfIn PDF document text
    • https://wotipufa.weebly.com/uploads/1/3/1/0/131069738/limokok.pdfIn PDF document text
    • http://senoratikazunub.22web.org/history_of_aflatoon_in_urdu.pdfIn PDF document text
    • http://top-salez.site/business_website_templates_bootstrap_freexb1k6.pdfIn PDF document text
    • http://lilubaxubaxulu.sportsontheweb.net/15367748806.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://tojopoxirer.rf.gd/4_pics_1_word_level_2143_answer.pdfIn PDF document text
    • http://vifewupanog.epizy.com/27005968111.pdfIn PDF document text
    • http://tilebimelexin.epizy.com/osteoporosis_gpc.pdfIn PDF document text
    • http://gewuxofude.epizy.com/53850425480.pdfIn PDF document text
    • http://murobalebijuge.rf.gd/47875741133.pdfIn PDF document text
    • http://boxesobalano.rf.gd/how_to_find_p_value_using_standard_normal_distribution_table.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aad15959-3d13-4d22-ac69-761d7d01320c/devafavixajevavanamix.pdfIn PDF document text
    • http://fimuwudefixolet.epizy.com/guia_ceneval_derecho_contestada.pdfIn PDF document text
    • http://wudazebej.atwebpages.com/airspace_diagram.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00c6393b-9232-4fda-acec-791f17c63f3d/85028446457.pdfIn PDF document text
    • http://fonofexigakivi.epizy.com/vaxirenazonewuwamap.pdfIn PDF document text
    • http://jikasetanixibef.epizy.com/bososaneterobezasiti.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_off0000fe8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE8B 5680 bytes
SHA-256: c592e10b51e5cdaa05c420a7d8ef8f1366ccd93842bc78ae259e594ca1299944
font_01_sfnt_off000111af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111AF 11032 bytes
SHA-256: aa81f30bfcefd502c802538fa152af86defbd2a02ecf64c4943ef12873c33bc2
font_02_sfnt_off0001373e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1373E 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176