Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7af626958a3ae8b…

MALICIOUS

PDF

62.6 KB Created: 2021-06-30 05:12:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: a8b4ab1dd1816eeeca84115482010ff5 SHA-1: ec12331ec2ecd2088e46bf5691d3ab15329db8a2 SHA-256: e7af626958a3ae8b9129786881cb6b2d19b64d45c4d2184983c1e168f6d188b0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample was detected as a malicious PDF by ClamAV and an ML classifier. It contains a link farm pointing to multiple compromised WordPress upload directories and disposable hosting sites, suggesting an attempt to distribute further malicious content. The PDF's structure and embedded links indicate a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7920

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
  • 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
  • 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://abofahed.com/userfiles/file/2577565347.pdf In PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160894fa73d798---jujixukol.pdfIn PDF document text
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/sgqpdg22et0j9fk6f3vji79193/sukijukopuku.pdfIn PDF document text
    • http://446888.top/userfiles/file/mukogogaxatiguf.pdfIn PDF document text
    • http://ecovn.vn/uploads/news_file/93828650722.pdfIn PDF document text
    • http://grapevinewinerytrail.com/clients/876125/File/birigolanidogesat.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3c620d0b10---wejig.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/71055367622.pdfIn PDF document text
    • http://resortcrimea.com/ckfinder/userfiles/files/35752142838.pdfIn PDF document text
    • http://fresh-j.info/images/uploadedimages/file/tugetobifale.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160aebb11690c2---19034812225.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160849fa9b5716---12090485280.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/4219b37dabe5fcb29d7b807696638a10/timewirapaju.pdfIn PDF document text
    • http://strap.sk/uploads/files/zomotobogamukom.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7b111e8e72---90828156444.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/assqrhadvd4a6vqhkqm97n6bt1/52025342205.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/2rlagr6tg3i6saauficpn9rnhe/fepilevumoretejuro.pdfIn PDF document text
    • http://hongdanhaudio.com/luutru/files/fewigusemetubemoput.pdfIn PDF document text
    • https://anpheatingandac.com/nbloom/fckuploads/file/lufisenibanekekuwupax.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dbdd170db7---durivivafodofapaxopano.pdfIn PDF document text
    • https://bursakaynak.com/userfiles/file/kalot.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/160900008d9dcb---doriluwamoxuvalezuvimu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=chemthink+ionic+bonding+answersPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c157.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC157 16976 bytes
SHA-256: 93592a42eb02203e7fbe0158ea61caf99873182fab245aacf2380cc45a114caf

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