Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9e7e7cc2b5cd44e…

MALICIOUS

PDF

94.8 KB Created: 2021-03-23 04:29:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: b1084cf61229f8cdd16a749475eff51c SHA-1: f3d0610348aa1169e750afc873a4fda1581dc41a SHA-256: f9e7e7cc2b5cd44e0b5a2da0022c14718524806ff6a118bb9f6752b8dbeba21c
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://baarspo.ru/strik?utm_term=percy+jackson+and+the+sea+of+monsters+chapter+7+summary PDF link annotation
    • https://nusutena.weebly.com/uploads/1/3/0/7/130739474/robibi_fewexiropusab.pdfIn PDF document text
    • http://dom-bita.org/good_english_grammar_book_for_high_school_students9ev26.pdfIn PDF document text
    • http://tadekurujere.22web.org/surface_area_and_volume_of_cylinders_worksheet.pdfIn PDF document text
    • https://fiwibafufo.weebly.com/uploads/1/3/0/7/130774969/kigudarikewa.pdfIn PDF document text
    • http://bestunew.xyz/mipifoxavikelerokuw83.pdfIn PDF document text
    • http://zogixobanifowi.22web.org/zewaluwekukogifuwulobod.pdfIn PDF document text
    • http://getyourscore.info/banevog6gv8c.pdfIn PDF document text
    • http://mists.space/bodujimewikotusepomuj90uyu.pdfIn PDF document text
    • https://sawotulexude.weebly.com/uploads/1/3/5/2/135298589/454aa90c81e9237.pdfIn PDF document text
    • https://babanude.weebly.com/uploads/1/3/4/0/134017813/5515735.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/bb458d16-fdaf-4d92-ae87-9bf824eb1299/niwofi.pdfIn PDF document text
    • http://xufazep.epizy.com/bigipitom.pdfIn PDF document text
    • http://bidavavaxekize.epizy.com/57574277637.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59df438f-ff06-4625-8111-0260b44ccdd5/famadojuzenowoguj.pdfIn PDF document text
    • https://61069a5e-3c5f-4884-a3c7-8c7552058b74.filesusr.com/ugd/0789d5_091e78bbda224835a46d7ab6198af318.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a0461e3-cb52-4465-b8ea-419accfd0fad/48376443368.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25552970-4f4c-4885-a141-e9149def3d96/were_going_on_a_bear_hunt_book_review.pdfIn PDF document text
    • http://beverotunege.epizy.com/nababin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3951bda9-01af-4ee0-a485-3d3164561aee/gofijubukagor.pdfIn PDF document text
    • https://d064ede3-316f-4d13-8ec5-014b2136b3bd.filesusr.com/ugd/154db6_fcf4462bf18c470c808b67a1e33209cd.pdf?index=trueIn PDF document text
    • https://35479656-6a94-44d6-ac55-da507c14a2ae.filesusr.com/ugd/d68318_9874f1d0968c4bc1ad000909e00659eb.pdf?index=trueIn 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_off000134c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134C5 5684 bytes
SHA-256: 812dfccc74dc9d7d0391426a30e14543dc59acb13f8daa88874900a0c763fda1
font_01_sfnt_off0001480a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1480A 10376 bytes
SHA-256: bc37f2a35cbdde1fc2edc26e40f1610e1e49fd2761a43d11607434e3e6fccd2c

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