Malicious PDF — malware analysis report

Static analysis result for SHA-256 93b7bd1265b20d53…

MALICIOUS

PDF

87.3 KB Created: 2021-07-02 06:24:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 76520149125567ed5f32eed06bd77bcc SHA-1: 1554095e78cd2a7e69edf52791b452a9eb5f5fb2 SHA-256: 93b7bd1265b20d53f271df2af4c903018e48cd6bb7246a80bcfd391c4bf1a7f5
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to lure users to external sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 6

  • 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 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://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/c71d8918420d0a3fc1a960b2ff31a35e/vajewexavivegukaba.pdf
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c955336a82---45859604610.pdf
    • http://shuswapladystriders.ca/userfiles/file/89168915114.pdf
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607b2944294f0---babelipaxaj.pdf
    • http://easthighclassof1962.com/clients/2/24/240b89ecbeded73b1ae3fdc7544f4fd7/File/9294317980.pdf
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad9d98afcd2---55501994512.pdf
    • http://seventyfirstclassof69.com/clients/60772/File/40811636410.pdf
    • http://3qlohas.com/CKEdit/upload/files/nuwal.pdf
    • http://bbfederico2.net/userfiles/file/xijasizololibubopofi.pdf
    • http://agro-vostok.ru/userfiles/file/38278870599.pdf
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/748e7c5d9c5552562a7d45b481faf2ab/97303089022.pdf
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c4e46cd5296---mopoguxisununesetazovelot.pdf
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/2c155f65a96c60c71c7082e79b33260a/sabedijaj.pdf
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609a4f86b07de---zuzatufoxekezope.pdf
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/160d703bc83955---7312596890.pdf
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/16085f164aa4c0---busekijemafafi.pdf
    • http://www.allatpatikapecs.hu/images/file/tolafu.pdf
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c89af4bb50c---dowim.pdf
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/ea68a3e3930684ed5a251ccc5cfadf06/21358240490.pdf
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/4c36f972dfe1dcb361832b59c611f8a1/92984987218.pdf
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/6e76a962be5a054275ad7d94f2cd1d92/jakopolugo.pdf
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/fcd2f8bbbc22b65cdd7a638bd49df6ec/29426978595.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=insanity+nutrition+guide+free+download
    • 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_off0000f1cd.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF1CD 16792 bytes
font_01_sfnt_off000109df.bin
9d4bc5c9c5fad339be758e0efddf7bfd988f47649ed3ea2b64cad5dbc9b66703
pdf-font-stream PDF embedded font (sfnt) at offset 0x109DF 17280 bytes
font_02_sfnt_off00013734.bin
276f1f8bcad5c21600553a91f15c04e3a36abd0b1524dfdf20bb514294407f54
pdf-font-stream PDF embedded font (sfnt) at offset 0x13734 10780 bytes