Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad7919c698540614…

MALICIOUS

PDF

77.2 KB Created: 2021-06-28 20:33:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e768243665b568d7aa5b25ee2e5a656b SHA-1: ff7251a605f8f858194f497443ca2ba2ac54f5a1 SHA-256: ad7919c6985406141c4d36f7b1c79b3c855b2ca8958609e81483f4bf11728a0e
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as a link farm and a phishing trojan. The ML classifier and ClamAV detection strongly indicate malicious intent. The file contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable hosting, suggesting an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 6

  • 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
  • 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://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cba47f3989b---gaxixoweritapomideg.pdf
    • http://sevoir.hu/uploads/file/70638083151.pdf
    • https://fcksa.com/ckfinder/userfiles/files/7898549581.pdf
    • https://associazionedynamica.it/uploads/file/70218122359.pdf
    • https://doanhnghiepvietnam.org/img_duhoc/files/68657360065.pdf
    • http://omg.su/upload/File/digikorosaj.pdf
    • http://sacoorhealth.pt/site/upload/file/detibipobepalo.pdf
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/81n8psh6cktrvva3f9r50g0ji0/goturofajaxudefelonamali.pdf
    • https://akapacha.com/userfiles/file/38686476302.pdf
    • http://10glazsikeyrosa.ru/file/90132509603.pdf
    • http://thecobbfr.com/clients/4/43/4363d5a08aa72aedcf7f7d4dd0675897/File/72999888747.pdf
    • http://sporteambiente.it/ckfinder/userfiles/files/topasujurolekenenisej.pdf
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/c7ef9e15d770b4baa4539e321c68e1c0/pakitodusidajiz.pdf
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/9ck8jejl7nrkd0s2b0vp1ilvid/novuriwowudinu.pdf
    • https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/jj3j883f734v24oenk9445re7r/nekezolexugefuzu.pdf
    • http://goldmustang.com/files/files/xuziwivuvumifarafom.pdf
    • https://steklo-shik.ru/userfiles/file/zoferexuzitoze.pdf
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/4e56a053659ccdaa0d4c2410c03356ca/fuwamunagumib.pdf
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a4b4c18be18---zekagoxizisuxelakevano.pdf
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/m5ol5kb2287592533be3aqcmb2/gezeko.pdf
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/16091f710e4925---97851556891.pdf
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/160c5fb8212c24---83172565462.pdf
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/ovgaeb4i9lgl9nksd9unpshlqe/10602987368.pdf
    • https://alteanetworks.fr/img/file/widojeterokat.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=how+to+make+money+in+farming+simulator+19
    • 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_off0000cb72.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xCB72 16792 bytes
font_01_sfnt_off0000e384.bin
b26894b452aef348f79a160a482a14cffaf0cfe58772f916e636e180993438ad
pdf-font-stream PDF embedded font (sfnt) at offset 0xE384 16092 bytes
font_02_sfnt_off00010d2d.bin
3af7f61cc5c5f4c48b266f2f4611c0ad7f0d27bff000c4fd4246fa9dd7d51277
pdf-font-stream PDF embedded font (sfnt) at offset 0x10D2D 11160 bytes