Malicious PDF — malware analysis report

Static analysis result for SHA-256 d55743dfec010136…

MALICIOUS

PDF

70.1 KB Created: 2021-03-18 21:13:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: ebf0f053da570c7464bd9c1221764343 SHA-1: f54ec0193e779c4b1ff9c78e5463f80713238d3e SHA-256: d55743dfec010136306378743f54d0b844db9a7e833f25535fc3a777b26d9bf9
156 Risk Score

Malware Insights

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

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 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://pelibifir.ru/award?keyword=al+final+del+arcoiris+pdf PDF link annotation
    • https://rinadulig.weebly.com/uploads/1/3/0/7/130739308/kuvokivekijaku.pdfIn PDF document text
    • https://japiravonasuv.weebly.com/uploads/1/3/4/6/134644749/35be868f61.pdfIn PDF document text
    • https://gixakipero.weebly.com/uploads/1/3/1/4/131412713/c5101bddd.pdfIn PDF document text
    • https://xizexinapak.weebly.com/uploads/1/3/4/3/134359948/7131923.pdfIn PDF document text
    • http://lukufogud.getenjoyment.net/upsc_assistant_commandant_exam_syllabus.pdfIn PDF document text
    • http://bosuxezaxad.mypressonline.com/45255247464.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jupoti/g_shock_3232_turn_off_alarm.pdfIn PDF document text
    • https://50aad03f-9d2a-47e6-be13-abd12f321b17.filesusr.com/ugd/3fd638_a72c7c3c953f46dbabddde51f06cd6c8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gozilum/32951539114.pdfIn PDF document text
    • https://s3.amazonaws.com/zetubakuz/simarelemepowuveduxij.pdfIn PDF document text
    • http://padegijogul.atwebpages.com/rebawi.pdfIn PDF document text
    • https://s3.amazonaws.com/nitatotol/rebif_package_insert.pdfIn PDF document text
    • http://wonavoka.epizy.com/ruzemepavemes.pdfIn PDF document text
    • https://s3.amazonaws.com/dutuzanob/fufevimasorar.pdfIn PDF document text
    • http://fakonin.rf.gd/what_is_the_opposite_of_inverse_matrix.pdfIn PDF document text
    • https://s3.amazonaws.com/gudukupir/12435115353.pdfIn PDF document text
    • http://zudegudaki.epizy.com/what_was_the_name_of_job_mother_in_the_bible.pdfIn PDF document text
    • https://s3.amazonaws.com/dotivaf/86149670723.pdfIn PDF document text
    • https://s3.amazonaws.com/rijaliwiguvex/vugerezokuwamepesep.pdfIn PDF document text
    • http://pasivete.epizy.com/vinilorod.pdfIn PDF document text
    • https://d70b1dc8-7d09-4148-9854-e6a7cae1b87b.filesusr.com/ugd/5899d5_0ca5908de4044f67b5a937ee4ccd101c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gixirojozogufux/national_action_plan_in_urdu.pdfIn PDF document text
    • http://mewudupite.epizy.com/where_does_e_come_from_in_math.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d2d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2D0 5140 bytes
SHA-256: 5a4a525921cde231dfa88131c9c1a1c3111e7cc7dbf8f0a29177dcb90b183d3c
font_01_sfnt_off0000e460.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE460 11360 bytes
SHA-256: f3e2fbfb093f734dfc144fe7f4b72b68fcca4f9c15456ae6ca6de32c50e44416

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