Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7fab80116627ee3…

MALICIOUS

PDF

82.6 KB Created: 2021-07-03 10:01:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2c1871cafc4cf0cbd1864e7a2a2f2c77 SHA-1: f2f8c88a2f635504fab71ea3f2389e01668b1dd7 SHA-256: e7fab80116627ee390cf7081595b692907cf474f2c28dcf7a482cd5e211c3f74
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. Heuristics indicate the document functions as a link farm, directing users to multiple compromised or disposable hosting sites, likely for phishing or malware distribution. The embedded URLs and the nature of the heuristics strongly suggest this is a spearphishing attachment designed to lead victims to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://schokobrunnen.com/idata/52142765058.pdf
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074d1371c702---26538956575.pdf
    • http://pcmcpropertyblog.com/wp-content/plugins/super-forms/uploads/php/files/aea6bfffa6a0250ac09faa0863965e25/58706106004.pdf
    • http://www.justgiveahand.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608ff8693288e---94295559484.pdf
    • http://tsg-vaganovskoe.ru/ckfinder/userfiles/files/zazuxabirexutilomaluzi.pdf
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160910719d62c2---watujuduxidalineme.pdf
    • http://pressvaluation.net/userfiles/file/6733012402.pdf
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/35fdd15ec694c4facd6508df6cda6fa1/78967815633.pdf
    • http://aunay-sous-auneau.fr/ckfinder/userfiles/files/90404236390.pdf
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/aa2776f3598962596b34681225bcc220/vuwebatowedik.pdf
    • https://jgmurphy.com/wp-content/plugins/super-forms/uploads/php/files/f56f10e07ce73cac25ecf2f1e20083e0/65521437465.pdf
    • https://giustofiori.it/file/katusuxejabet.pdf
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607886a01c295---3358584077.pdf
    • http://ledins.lv/cms/file/zoluxa.pdf
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c439f7a9ac4---golidodonopogoriwinil.pdf
    • https://lescourailleurs.com/upload/editor/file/jugonotikunu.pdf
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/160988465d8ef2---9273554605.pdf
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/5r9u1nm6mavo8oidr2e49dtkv0/vutesakamarufoj.pdf
    • http://pattersonandoliphantfamily.com/clients/875492/File/61269891377.pdf
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/77581060976b10a886cb890407d5bddc/pololaf.pdf
    • https://dixietemporarystorage.com/wp-content/plugins/super-forms/uploads/php/files/2fc924397e24b739ff99f8c2584e6a5f/zebimesu.pdf
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/t95j0srlplmh6uh4c8g3co86j3/kavumozidu.pdf
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098b17bb1024---63791670979.pdf
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/97d020157c3f7a37183e36bb8346e896/87626024437.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=importance+of+solar+energy+in+agriculture
    • 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_off0000dfce.bin
d1b2b9e06a84ffb852401c48966ff9ee6c43cdce9dfbb78cb7f12b92e2e0a2d5
pdf-font-stream PDF embedded font (sfnt) at offset 0xDFCE 16848 bytes
font_01_sfnt_off00010b82.bin
e32f7f2cf2f5249768dffac2e9c2e92e85d92ac38cabb89b09ff3d6bc9488cb3
pdf-font-stream PDF embedded font (sfnt) at offset 0x10B82 10988 bytes
font_02_sfnt_off00012509.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12509 16792 bytes