Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e5f6f86a0fbf729…

MALICIOUS

PDF

106.1 KB Created: 2021-07-13 20:14:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: e672029f76842ad5b6b8c3f7697858cd SHA-1: db61a6ec7396af22fe6e47e5414b45cf9ff12850 SHA-256: 4e5f6f86a0fbf729766aab2b49b5933d00c942d1bccf47f7791e8b9fed97da85
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised WordPress upload directories and other disposable hosting sites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious redirection, likely leveraging embedded JavaScript for obfuscation or execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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 http://italianopizzeria-pg.com/uploads/files/susibekozerisibole.pdf In PDF document text
    • http://nfrostov.ru/upload/files/pumozedovafupanus.pdfIn PDF document text
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/672eb92a663e5e57ff9687b619a867c9/35910636382.pdfIn PDF document text
    • http://xn----itbbfrdrdbd4bgy6gi.xn--p1ai/webroot/files/files/bafuxeremozekupovaxe.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf58011b2a---72269778590.pdfIn PDF document text
    • http://accronline.com/userfiles/file/77759178588.pdfIn PDF document text
    • http://jarosi.hu/files/file/tadawawunobotomili.pdfIn PDF document text
    • http://dentalclinicbangalore.com/uploads/ladoninokitisem.pdfIn PDF document text
    • https://parquesanalbertohurtado.cl/ckfinder/userfiles/files/lozalom.pdfIn PDF document text
    • http://www.aluvascientific.com/UserFiles/file/mosexifopenuf.pdfIn PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/8103435f2c503522e6004bb117f76ed1/lojumapojiwi.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/tjbi38tr32tajpv94ev5udbef0/subukigabikexipu.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/0po6cpm2d4n9lj6n6k7h6e2kj0/vavuxavodekime.pdfIn PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/1u3vtg1rk3m2pkcjsbb5e28ug5/99951219993.pdfIn PDF document text
    • http://bukvoznaika.ru/ckfinder/userfiles/files/gurapobunaripevefu.pdfIn PDF document text
    • https://toptenstudy.com/upload/files/BodyFile__60BFAC2CD532B.pdfIn PDF document text
    • https://thinkhigh-tech.com/d/files/65878595157.pdfIn PDF document text
    • http://goldnumber.info/userfiles/file/66007331564.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/5c6f113d3239d19331a88657db32085b/32198999711.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c874b59390a---lifilojavamif.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=best+bookies+grand+nationalPDF 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_off0001394d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1394D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001515f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1515F 18156 bytes
SHA-256: eac35b97fc0c62dc96eadbd21467bf2716e033e6f9bc4a2da0bb6dac0d149d27
font_02_sfnt_off0001816a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1816A 10708 bytes
SHA-256: 1a67162386fac4e42a30b928cd6ce50fa156f057d8dc76981cd22386fd66ef62

Open this report in the interactive analyzer, or submit your own file for analysis.