Malicious PDF — malware analysis report

Static analysis result for SHA-256 5370e5c681d5bdc4…

MALICIOUS

PDF

91.4 KB Created: 2021-04-06 04:01:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: af0fa4b1f919b7d17fbee5d9cd6d5e51 SHA-1: 1d0d05c385476b8bcc8841f8cf627e458bcfce63 SHA-256: 5370e5c681d5bdc4a8cc138cc65430930919329ec47b3306a9b126dc466874df
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9994

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 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://jottigo.ru/award?keyword=lower+back+stretches+pdf+spanish PDF link annotation
    • http://8bitbeardsco.com/jemerulovqhl1.pdfIn PDF document text
    • https://cdn.sqhk.co/wimakebibane/jaRhde5/crazy_cee_lo_green_chords.pdfIn PDF document text
    • http://islta.fun/wisconsin_boater_safety_course_answersmuvog.pdfIn PDF document text
    • https://cdn.sqhk.co/mibajufaneja/jniXhfN/tukigubanapakoval.pdfIn PDF document text
    • http://libralab.digital/avh-4100nex_bluetooth_greyed_outoq8qw.pdfIn PDF document text
    • https://cdn.sqhk.co/dufelogaruf/j3uibdL/dabemagifonozobofot.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://e055bcc9-c4f1-4c6c-8dcb-0912bf54750f.filesusr.com/ugd/b4a829_f1e14ececce1477eb4ab2fbe2686025f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nitidadufetenu/41310441613.pdfIn PDF document text
    • https://s3.amazonaws.com/sonutopexaramuf/are_jelly_beans_bad_for_your_teeth.pdfIn PDF document text
    • https://s3.amazonaws.com/rizijubovapuk/12291117867.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdfc0579-b5ac-4942-a5a3-68219fb32bf5/45324923574.pdfIn PDF document text
    • https://s3.amazonaws.com/kawotexulozax/service_desk_analyst_interview_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/zufaxepixiguxax/4249848270.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabom/kosepiv.pdfIn PDF document text
    • https://s3.amazonaws.com/ronatiduzoxij/rizudufanamejaludid.pdfIn PDF document text
    • https://32cf4326-ba62-484c-a3ca-05d02c2dd2e5.filesusr.com/ugd/0b46e6_4a74f0c14df247dea8aa35560ebd5c8d.pdf?index=trueIn PDF document text
    • https://0503187d-52cd-4237-9521-a3cb9bf551ae.filesusr.com/ugd/5bb01c_864aa028a34548d3afe4da4dcb3b4e69.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2467090-e6f2-4ec3-b398-f3a54169f38f/the_ugly_american_book_vs_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/meludav/destiny_2_how_to_get_last_wish_raid.pdfIn PDF document text
    • https://s3.amazonaws.com/vibuvomomuv/ejemplos_de_dialogos_entre_dos_personas_en_ingles.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010171.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10171 3776 bytes
SHA-256: 5c8ce053674138b26c742fb08c873334dbf42af59d115025b7f97cdbf689aa8f
font_01_sfnt_off00010f00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F00 5448 bytes
SHA-256: 8c3cb04a5791891faa183dd8acf1a82cbcfba5ae29b8d36ea586689c6f1486e7
font_02_sfnt_off00012192.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12192 1800 bytes
SHA-256: 51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
font_03_sfnt_off00012a20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A20 12452 bytes
SHA-256: d93c99bda06ee3e46ac3020b9a0989395c5120ce7446200e008388970c255cb7
font_04_sfnt_off0001524e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1524E 2740 bytes
SHA-256: a253346d2a91117052bd7e46fc24be0b8556c2d56276afa7d77c507aae5d20db

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