Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9bc46c60a250cbf…

MALICIOUS

PDF

75.3 KB Created: 2021-09-19 11:09:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 73ba61480b6216f7ec57fd33bab70f52 SHA-1: f9a7f37357727cec7e84c503999c13d152fe0a7e SHA-256: d9bc46c60a250cbf58123936ff25761738443b0d9b6dfddd493a9087f8523c7a
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of a raw IP address in one of the URIs further indicates suspicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://culturasiapamplona.com/guiarte_userfiles/files/fimivaboporilemapem.pdf In PDF document text
    • http://botosani.ro/img/uploads/file/wixadilabitanisinuku.pdfIn PDF document text
    • https://ispartaorganizasyon.com/ckfinder/upload/files/gonebowajobexarogasego.pdfIn PDF document text
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/738de5905bca98ff5154a101abbce695/gezonuxajutus.pdfIn PDF document text
    • http://evaemlak.com/userfiles/file///jawanogefalirugedifotine.pdfIn PDF document text
    • http://140.121.125.49/ckfinder/userfiles/files/20210911_050210.pdfPDF link annotation
    • http://satyavnetworks.com/fck_upload_images/file/vozaxevijifowoxemivowiko.pdfIn PDF document text
    • http://gdlejia.com/uploadfile/files/20210918_211046.pdfIn PDF document text
    • http://fpempresa.cen.es/userfiles/files/daxovoxilobinozakes.pdfIn PDF document text
    • https://tradingphrases.com/userfiles/files/kodasoxasedezedodu.pdfIn PDF document text
    • https://fizjolech.pl/userfiles/file/parujerubafaroka.pdfIn PDF document text
    • http://baltyk.recykling-rejs.pl/imgturysta/files/68169125430.pdfIn PDF document text
    • http://marktoby.com/akram/know_news/admin/userfiles/file/ruvaxorexikodekik.pdfIn PDF document text
    • http://s2ipower.com/survey/userfiles/files/gozodavemaruma.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/49c41aa083465699fb65341521831870/gamepikopis.pdfIn PDF document text
    • https://ans5680.preneed91.com/upload/files/nafamet.pdfIn PDF document text
    • http://pzhjintai.com/upload/files/dubukoduwuleba.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16139f66424753---25940229604.pdfIn PDF document text
    • https://anmimar.com/royal/userfiles/file/miwixafofobugimasoka.pdfIn PDF document text
    • https://balarampurblock.in/ckfinder/userfiles/files/74873078948.pdfIn PDF document text
    • http://joesservicecenternj.com/userfiles/files/36893492762.pdfIn PDF document text
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/72e45c9f92343a7e10d0053ae9596c1d/1513122847.pdfIn PDF document text
    • http://eakqshop.com/ckfinder/images_store/files/rekuvokilejedokokime.pdfIn PDF document text
    • https://kokomanis.com/contents/files/83433134475.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=temple+run+oz+unlimited+coins+and+gems+apk+free+downloadPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bd05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD05 18588 bytes
SHA-256: d84336bdcec151be0d1db98c1c35facd624d0be735b3719d2eaef4ff9ab2caed
font_01_sfnt_off0000ed26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED26 11264 bytes
SHA-256: 71cfb13e7c5f9773ffa7fcb97c7db1736865c712eaf19815edd0da1bf6e741f1
font_02_sfnt_off00010772.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10772 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1