Malicious PDF — malware analysis report

Static analysis result for SHA-256 93a8998e268b6aa9…

MALICIOUS

PDF

86.2 KB Created: 2021-03-17 17:31:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: fbf4494aeb0af1dbd46e9cd604fa1bcc SHA-1: d78e6db5418bc4069798f1ad6e1f1adc274386d0 SHA-256: 93a8998e268b6aa99663ff381a962dcf9ebc6fa36c5ac4bac160c7c3d010675f
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains a large number of external links, many pointing to disposable hosting services, suggesting a link farm or phishing operation. The primary URL identified is https://xezojetit.ru/wix?keyword=square+d+pressure+switch+9013fsg2+manual, which appears to be part of a keyword-stuffed SEO strategy. No scripts were extracted, but the PDF structure itself is indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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 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.
  • 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://xezojetit.ru/wix?keyword=square+d+pressure+switch+9013fsg2+manual PDF link annotation
    • https://betutoza.weebly.com/uploads/1/3/4/8/134899773/dezez.pdfIn PDF document text
    • https://vojawozusuv.weebly.com/uploads/1/3/1/1/131164351/cde6aad51d00.pdfIn PDF document text
    • https://lividuxu.weebly.com/uploads/1/3/4/3/134354071/xafevawimaludu.pdfIn PDF document text
    • https://wisapemewe.weebly.com/uploads/1/3/4/7/134713478/lakabibagoritu_menipuz.pdfIn PDF document text
    • https://pujuwofox.weebly.com/uploads/1/3/4/8/134882524/kowewisu.pdfIn PDF document text
    • https://wiwitubiz.weebly.com/uploads/1/3/5/3/135351816/lilatusoru_digoguwadakiva_wivekes.pdfIn PDF document text
    • https://piwupibuzidiki.weebly.com/uploads/1/3/0/7/130739867/jovinibiwerawo-tatevojomatufat-xebuwirin-jufufonumo.pdfIn PDF document text
    • https://mixutuxo.weebly.com/uploads/1/3/4/6/134692071/vodasigagu.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://uploads.strikinglycdn.com/files/637ffe8e-1592-4ce5-978e-e477d68e0d13/92204144849.pdfIn PDF document text
    • https://s3.amazonaws.com/vabemavuputenif/weloxobitajonadabanerefi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40d5bbd6-d142-4f7a-9a03-2540f3103a7f/what_do_the_icons_on_my_alcatel_phone_mean.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02bb8689-3e90-4f85-9cef-001c6a71de45/koxele.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e74be8f4-89cb-4d21-92d3-50a63e3fd3d7/3121908971.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1dd5800c-07d1-44d8-89ed-f09c86207ec6/33251939654.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6bb3e5b-fcc8-4c4c-88e8-7a3c960c8604/sex_and_the_city_series_netflix_country.pdfIn PDF document text
    • https://s3.amazonaws.com/xefejevife/apna_time_aayega_ringtone_mobcup.pdfIn PDF document text
    • https://s3.amazonaws.com/kudefem/odia_dj_song_new_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/fekaduvopigab/esl_polite_requests_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7086480f-7d9e-402a-aa73-02348ac4646e/furojipurogedagavaxanuw.pdfIn PDF document text
    • https://s3.amazonaws.com/baxunaf/56668840410.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/065528ef-0100-42e1-8417-d5067fefdd55/53791965089.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_off0000fefb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEFB 6308 bytes
SHA-256: b6e5dd9b36464412ea362ccff67459d0f3aa292784b4cd673fc436e35e331a99
font_01_sfnt_off00011451.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11451 11964 bytes
SHA-256: 05f325d9b96d5a55927e6f559f146627fda5f0d60465df7f02409899de3b3ccf
font_02_sfnt_off00013d18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D18 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333