Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ad1a47258fd9bce…

MALICIOUS

PDF

90.6 KB Created: 2021-03-16 15:55:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: e9a2232a1d7a7275bc2b00d8a1a30a85 SHA-1: 3bf57b7db64e012c76d8204d13bde1721024a8bd SHA-256: 1ad1a47258fd9bcebfe3d4d7855c3511ff8867ff427fe06cd852d4f5b66ce759
126 Risk Score

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 0.9964

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://midufefew.ru/strik?utm_term=how+to+study+for+comptia+network%252B+reddit PDF link annotation
    • https://leponinidokawe.weebly.com/uploads/1/3/4/5/134502666/4062519.pdfIn PDF document text
    • http://outputqwvk.space/the_big_short_book_sparknotes5xf72.pdfIn PDF document text
    • http://picsonair.com/toddlers_short_bedtime_stories_youtubef8l6j.pdfIn PDF document text
    • https://modovepa.weebly.com/uploads/1/3/4/4/134464072/jodomowitejasofag.pdfIn PDF document text
    • https://xisuviwilizej.weebly.com/uploads/1/3/4/3/134320176/gejusetike-xojufikare-jeterovofepo.pdfIn PDF document text
    • http://autoupgrade.website/29313424036dpecv.pdfIn PDF document text
    • http://easycreditscore.info/the_tattooist_of_auschwitz_book_sparknotes8vk2n.pdfIn PDF document text
    • https://nalirukixew.weebly.com/uploads/1/3/0/9/130969663/1057.pdfIn PDF document text
    • http://findssldz.xyz/worarugorofenigotz7523.pdfIn PDF document text
    • http://digosutinovun.iblogger.org/morotesifopapobemog.pdfIn PDF document text
    • http://xijipeva.mypressonline.com/lee_county_florida_school_calendar_2020-21.pdfIn PDF document text
    • http://tolejif.22web.org/67734823454.pdfIn PDF document text
    • http://criticcxck.space/402413487859tdcl.pdfIn PDF document text
    • https://vezulapas.weebly.com/uploads/1/3/0/9/130969209/61d14476.pdfIn PDF document text
    • http://falorilipeb.mywebcommunity.org/38377226238.pdfIn PDF document text
    • http://wowit.pro/14967864450qrqed.pdfIn PDF document text
    • http://shop-onlinediscount.xyz/a_song_of_ice_and_fire_6th_book6oaqb.pdfIn PDF document text
    • http://junumidutuzakox.getenjoyment.net/davabo.pdfIn PDF document text
    • http://wopedejani.iblogger.org/how_to_start_troy_bilt_storm_2410.pdfIn PDF document text
    • http://harkateine.fun/shooting_balls_3d_online_gamesugfei.pdfIn PDF document text
    • http://mofijajuxotup.iblogger.org/how_to_knit_and_purl_on_a_sock_loom.pdfIn PDF document text
    • http://idealslimitalia-ufficiale.site/valoracion_de_las_14_necesidades_de_virginia_hendersonlzg37.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vudexejuvejutek.rf.gd/best_stock_app_2020_reddit.pdfIn PDF document text
    • http://godavuvexo.epizy.com/freshers_core_java_interview_questions_and_answers.pdfIn PDF document text
    • http://gurabagoderes.atwebpages.com/keledasomozajudanomasiwap.pdfIn PDF document text
    • http://tukufewusi.epizy.com/37727714924.pdfIn PDF document text
    • http://jawegoxizifiti.epizy.com/commutative_law_worksheet.pdfIn PDF document text
    • http://mewabetowa.myartsonline.com/2649326363.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_off000122be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122BE 5488 bytes
SHA-256: f346c9b6d1164cd003a08b704c63f37144d01f62d802fe1bda65b256516b5a59
font_01_sfnt_off0001356a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1356A 11476 bytes
SHA-256: c8ada4d3a172259323367cc927343fab362aeb0ea64adb73cbaaff3505f8c5a5

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