Malicious PDF — malware analysis report

Static analysis result for SHA-256 69d6e2b901805bf2…

MALICIOUS

PDF

87.4 KB Created: 2021-06-29 21:47:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 08841a7f83dba789c4390636cfa2b2b0 SHA-1: bbd2e2dfc3c842ee1425db5af28398e2c3d551a6 SHA-256: 69d6e2b901805bf2f0067290f5017d41183053d70a079808470ec52a706a968f
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, including a ML classifier and ClamAV, indicating a high likelihood of malicious intent. The presence of numerous links pointing to compromised CMS upload storage and disposable hosting suggests a phishing or malware distribution campaign. The document body is heavily obfuscated and unreadable, providing no direct clues to its purpose beyond the heuristic findings.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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 https://alnahamgroup.com/userfiles/file/vagomidogep.pdf
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/504a34c82145c2cf649e1c3770ef0f8c/75791895479.pdf
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160beb53db3bed---19904305564.pdf
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082e3f2a5b8b---32497547724.pdf
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c125f15f538---seralilusisamoni.pdf
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/rqm0mjsd4a7l97gsjkbtmh8cb2/38423245676.pdf
    • http://architettorobertafasola.eu/userfiles/files/lafepoxipurudiki.pdf
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/68e1e5800e61ba83a2dc86008aaf60ca/mopegosexoregulonekaseti.pdf
    • http://asiadomainstore.com/userfiles/file/mobig.pdf
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/16082611b60278---fewisokipoxonar.pdf
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/f43a3abee2bb182c210ccdcb1a9b97a5/1152426967.pdf
    • https://vicotelecom.vn/static/source/images/file/wosolokosugupimaz.pdf
    • https://securitydm.com/slicice/file/8048948955.pdf
    • http://duszek-lasu.pl/userfiles/file/89038179178.pdf
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aff06060eb4---99582126227.pdf
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/e129df27db4d376d5bedf0f751a04d6e/12657717796.pdf
    • http://ajivikafinance.com/userfiles/file/rupurikanefokesexu.pdf
    • https://edu-mate.kr/_UploadFile/Images/file/budadopitowepe.pdf
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/86d67db0b9cf9257963768b721d384bc/sepemanuvunaj.pdf
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/k462k4uue970ge5vl6k28r6tnd/32544500981.pdf
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/16073d7005d369---varalofubojovuvuzugufiti.pdf
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/571e6b7bcd4257f8d5beeb4981134fcc/zevisuvewevola.pdf
    • http://hifimarkt.eu/kunden/kronhardt/ckfinder/userfiles/files/fuvewu.pdf
    • http://ahchala.com/img/file/30565424175.pdf
    • https://grandplaza.bg/uploads/assets/file/81982069994.pdf
    • https://coluer.ir/documents/file/20323970998.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=celebrities+asking+for+money
    • 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_off0000f23c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF23C 16792 bytes
font_01_sfnt_off00010a4e.bin
6aeae691250da5421c264a362de4d9081f956b9ca1b3f957dea7a351a78658f7
pdf-font-stream PDF embedded font (sfnt) at offset 0x10A4E 16992 bytes
font_02_sfnt_off000136d1.bin
cfa79cde66609379ea052b908ba0c386091056e5f3b3318c4c03a878cfee874c
pdf-font-stream PDF embedded font (sfnt) at offset 0x136D1 10936 bytes