Malicious PDF — malware analysis report

Static analysis result for SHA-256 2865025e8aef839d…

MALICIOUS

PDF

91.8 KB Created: 2021-07-15 15:31:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 06abc042948b4c7438a276b01e05abdf SHA-1: 142e9ef976d99ef1b7a33441f5ac6519ac1da6ad SHA-256: 2865025e8aef839dfb30ea1b3d0a7b87a017d1b6db8819be632ed8a9794f18d2
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with many URLs pointing to compromised WordPress sites and potentially disposable hosting, suggesting an attempt to distribute malicious content or engage in SEO manipulation. The presence of external URIs and the overall structure point towards a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9932

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.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160753ae43d9fe---95863704793.pdf
    • http://omak1968.com/clients/71178/File/5268081236.pdf
    • http://weingut-suppan.at/files/vuwobib.pdf
    • http://rorolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/nuzoxupirezova.pdf
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160980e4c11bfa---62806955120.pdf
    • https://gradeagroup.com/wp-content/plugins/super-forms/uploads/php/files/r6de31hr1ul5f4nv0pombnsnv6/52768617740.pdf
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/80d2c0139e2da8fd76a071827a67a7ce/72825046445.pdf
    • https://koetec.com/home/~ptow/public_html/ckfinder/userfiles/files/74112690328.pdf
    • http://hpworld.hu/data/pic/Image/file/saxejetukizeroron.pdf
    • http://fotossc.pl/_files/file/koger.pdf
    • https://useoneconvo.com/wp-content/plugins/super-forms/uploads/php/files/4183c111711427c674d69edf1f1193c7/jolajabunejoxozulatene.pdf
    • https://accesoriosalmayor.com/images/userfiles/file/81445330500.pdf
    • https://carlojans.com/cms/file/tegogawilejudazotagokozo.pdf
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d6df1d5daf---vigopitew.pdf
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160b5a5c487b46---84496778343.pdf
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f77c61aaac---61663161941.pdf
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/tn3ofgc671fj3vl1der4ojjtra/54319008005.pdf
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/1609c95028c78d---69459601116.pdf
    • http://westboroughhigh76.com/clients/b/bc/bc4984db1d461a603911d7e4814e3e59/File/21141888986.pdf
    • http://enotecagaribaldi.it/userfiles/files/kotanalixuwidufuxapala.pdf
    • http://sochi-polyana.com/ckfinder/userfiles/files/72931468716.pdf
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac742db707a---garaxebidemamifi.pdf
    • https://ludifrance.fr/userfiles/file/70791271763.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=kinemaster+for+pc+without+watermark+2020
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecaa.bin
82e21e41d600fee83f541c44c4b508ef9c5d268a23f436a61178e4da288cfc6d
pdf-font-stream PDF embedded font (sfnt) at offset 0xECAA 17212 bytes
font_01_sfnt_off0001195d.bin
fd494554c7a7a2c4488382a78096c535ff133766c7221992be4f6a58596b2467
pdf-font-stream PDF embedded font (sfnt) at offset 0x1195D 16164 bytes
font_02_sfnt_off00012ed3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12ED3 16792 bytes
font_03_sfnt_off000146ea.bin
6aeb341347000e8e81aeabc177378b639d6411d6edf1e101b9a5b77b00813f31
pdf-font-stream PDF embedded font (sfnt) at offset 0x146EA 11208 bytes