Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c192d3492f894ec…

MALICIOUS

PDF

70.7 KB Created: 2021-03-05 12:41:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 0666dce3d1517f384ef5eab8805b0dd6 SHA-1: cacb8d6ab0923cb29fb1b2e285511522a903039c SHA-256: 2c192d3492f894ec8d7983df53504bf185055c1b6ad7ae4df83a330bfd87f850
126 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high probability of malicious intent. It contains numerous external URIs, with one pointing to 'nipisod.ru', suggesting it functions as a link farm or phishing lure. The PDF structure and embedded URLs are indicative of a spearphishing attachment, designed to redirect users to potentially harmful content.

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
  • 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://nipisod.ru/wb?keyword=an%20introduction%20to%20language%20fromkin%20pdf PDF link annotation
    • https://mapetafuje.weebly.com/uploads/1/3/2/7/132741207/7e7d44b3167e356.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501028/normal_5ff1b9d853c97.pdfIn PDF document text
    • https://megogira.weebly.com/uploads/1/3/4/5/134590171/9888456.pdfIn PDF document text
    • http://wipunemobak.mygamesonline.org/16870405433.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423154/normal_5fc8f8b324f4a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455907/normal_5fcbeb2935306.pdfIn PDF document text
    • https://tavurusifuta.weebly.com/uploads/1/3/0/7/130740255/tabar.pdfIn PDF document text
    • https://ramaxudefe.weebly.com/uploads/1/3/4/0/134042793/zadaruf_buwefabewuwulit_dulisotisute.pdfIn PDF document text
    • http://rilotelexewobos.iblogger.org/nomozemotuf.pdfIn PDF document text
    • http://lezigovedavide.getenjoyment.net/post_civil_war_reconstruction_period.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/0031c2b1-a131-48ca-9024-561f1856e470/nicholas_sparks_two_by_two_movie_release_date.pdfIn PDF document text
    • http://rorazizaxaf.atwebpages.com/78441854443.pdfIn PDF document text
    • https://s3.amazonaws.com/jowutoneranemuk/10705154306.pdfIn PDF document text
    • http://demiwadipojaz.epizy.com/what_does_allowance_mean_in_tax_forms.pdfIn PDF document text
    • https://s3.amazonaws.com/ninazarila/workbooks._add_template_c.pdfIn PDF document text
    • http://lawupoxag.epizy.com/mufenifufa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3235771b-a89e-45ae-b9ba-537decad1535/craftsman_27cc_weed_wacker_string_replacement.pdfIn PDF document text
    • https://s3.amazonaws.com/mojivikapeti/24826468789.pdfIn PDF document text
    • http://resilasijajatil.myartsonline.com/xexad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87cdc744-d497-49c7-9277-edb33aea916f/ge_dehumidifier_70_pint_manual.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_off0000d60f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD60F 5352 bytes
SHA-256: 55c4eed3463f20e52c511943bdc063cac8dbbad28e21d03737f33cb624c81d53
font_01_sfnt_off0000e82f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE82F 11048 bytes
SHA-256: f942a807b8bbd0068a9c0020523dbf3da409107d66fb0c4e8e5cb7b5d36a1e8d

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