Malicious PDF — malware analysis report

Static analysis result for SHA-256 970affb1813fabdb…

MALICIOUS

PDF

81.8 KB Created: 2021-09-18 18:12:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5a1ceacbea5872639464e72dcb533028 SHA-1: bfeb5890902b4f5e51138a89da0f75e302e71ad0 SHA-256: 970affb1813fabdb3feeb0d1bc9d381b86cde2c969e6cdc4c85ca71bf3dd2585
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links, many pointing to compromised CMS upload storage and disposable hosting, indicating a likely phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the nature of the embedded links and the PDF structure suggest it is designed to redirect users to malicious sites, potentially for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://ladangmimpi2.com/contents/files/lorepafozuvavimike.pdf
    • http://xn--90aoj0agf7cq.xn--p1ai/uploads/files/1110595765.pdf
    • http://faurerom.com/userfiles/file/wuvuwid.pdf
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/5f6f6869f0770afea2306f50a40c114d/xepofuzekelobikoxikanob.pdf
    • http://smeeing.com/userfiles/files/lixojuwi.pdf
    • http://hiro-seiko.com/upload/files/20139374693.pdf
    • http://digitalqwerty.com/ckfinder/userfiles/files/53304462142.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16140f7bcac7be---17353385778.pdf
    • https://mpksieradz.pl/upload/file/sikasagokorufisinulemu.pdf
    • http://itineraire-consulting.com/ckfinder/userfiles/files/54569235814.pdf
    • https://stepweystudy.com/ckfinder/userfiles/files/dewigudegowaguzutifadug.pdf
    • http://www.museopizarra.com/ckfinder/userfiles/files/58156258775.pdf
    • https://aspirans.com/files/file/jejumasoxixiribegek.pdf
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/161447c3dcdfcf---41238068728.pdf
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/uiga42qfgden4a3tjq6kpc9l70/96098474512.pdf
    • https://grandiosieventinuziali.it/filesUploads/file/14105161639.pdf
    • https://vico-domrep.com/ckfinder/userfiles/files/gubupijowupowon.pdf
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141c074795c0---ruvabuwa.pdf
    • http://nwatchonline.net/userfiles/file/41753680823.pdf
    • http://lesen-und-schenken.de/userfiles/files/vovuraparakeko.pdf
    • http://begues.mobi/userfiles/file/totovusovugejiloje.pdf
    • http://centronegozi.com/public/27155886998.pdf
    • https://cfbadalona.net/ckdata/files/95686366731.pdf
    • https://ceral.pl/ceral/pliki/file/jowotufipizovipadosot.pdf
    • http://rockhousemethod.com/ckfinder/userfiles/files/53171830693.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=new+pubg+apk
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d89c.bin
3c9b56a5f004d3c2249163f21fbb5c188f180dfb0f2d3eec072f29777ccc00d0
pdf-font-stream PDF embedded font (sfnt) at offset 0xD89C 19768 bytes
font_01_sfnt_off00010b91.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10B91 16792 bytes
font_02_sfnt_off000123a8.bin
9790b1cf440cd1822e9c3448fc1486a2d2e6edcb809716826aa9215e0cac9927
pdf-font-stream PDF embedded font (sfnt) at offset 0x123A8 10092 bytes