Malicious PDF — malware analysis report

Static analysis result for SHA-256 727e8f292bd3cbb9…

MALICIOUS

PDF

78.0 KB Created: 2021-04-09 02:32:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e463f0aa74a9d5eae6ce91ba110f0399 SHA-1: 10998f10fe07e2e4b7ee21856391abfa9be97308 SHA-256: 727e8f292bd3cbb9fa06edab5327f4779023d80df6359cbeb684a0cb2916304a
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9996

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://kuzutuzo.ru/strik?utm_term=the+hunger+game+download+movie PDF link annotation
    • http://tobufupevujuma.mygamesonline.org/pierre_crepon_evangelios_apocrifos.pdfIn PDF document text
    • http://newipufisatag.scienceontheweb.net/lufiseveputifotisobut.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420930/normal_604ddda4a8f35.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407571/normal_60110578c7d20.pdfIn PDF document text
    • https://siwufofewexiv.weebly.com/uploads/1/3/5/3/135329456/nigol.pdfIn PDF document text
    • https://duwelivupegated.weebly.com/uploads/1/3/4/7/134711348/1690223.pdfIn PDF document text
    • https://gomafaned.weebly.com/uploads/1/3/5/2/135296522/nabozi.pdfIn PDF document text
    • http://slimitalia.space/657002722109rdm0.pdfIn PDF document text
    • https://rijivujebevobog.weebly.com/uploads/1/3/4/4/134488471/6a7ed1db38b44.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491169/normal_60045a9a4c38b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365570/normal_60011b6786ad4.pdfIn PDF document text
    • http://allieshouseofhope.com/javascript_format_number_no_decimal_places5r9jp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482671/normal_6023839697855.pdfIn PDF document text
    • http://tugrull.com/afghan_calendar_changer4nwcx.pdfIn PDF document text
    • http://veviwumifuvemuz.mypressonline.com/personal_computer_hardware.pdfIn PDF document text
    • http://opsnatur.fun/watch_venom_online_free_putlockersqu1cw.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/0842782a-b34f-4ff6-a096-cf17ab1b3d4a/weight_training_programme_for_runners.pdfIn PDF document text
    • https://s3.amazonaws.com/pisedij/acca_f8_summary_notes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af3d386a-1915-4fd8-ba79-bd4615482c62/more_than_ever_before_meaning_in_spanish.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f2eafe5-e629-498d-8c51-aaa7402c5d62/65438241149.pdfIn PDF document text
    • https://s3.amazonaws.com/panalipolifod/pippi_longstocking_movie_cast.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/913e9122-a1c7-4ab6-a250-7b02cd9cf90c/connect_directv_genie_mini_to_internet.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_off0000f30f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF30F 5160 bytes
SHA-256: 336c62cb126e50c5a0ba5bcc4edb6164c4f7f7471864ebfaa8789a6cae6461b9
font_01_sfnt_off00010485.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10485 11040 bytes
SHA-256: ef7790345cd5960d95753ba673e6376b28404650d6fd2009e6a006aaefff3d10

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