Malicious PDF — malware analysis report

Static analysis result for SHA-256 7de3730658fba1a3…

MALICIOUS

PDF

89.1 KB Created: 2021-07-05 20:22:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3c8183ec2f52eb3f6a54fa30c1804fac SHA-1: d76ff1e5c44d3d9caa9a23550b045864e6a77c1a SHA-256: 7de3730658fba1a35b7011a4d42c5723d2700847e7810b2894fde74ca6ccc73e
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to websites hosted on compromised CMS platforms, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent. No scripts were extracted, but the structure and URL analysis point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/06e2c729c3cdbdbab10744dcaecf3176/13686840595.pdf
    • http://pawsandtiaras.com/ckfinder/userfiles/files/nelex.pdf
    • https://bahispesinde.com/gnc/veri/_files/38231712128.pdf
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/026b25337661c654551ff62b4cd90251/3945019519.pdf
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607a0d26e53f5---9372549905.pdf
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/08e8d4489614adc56d72cf245bc4cb7f/10949998923.pdf
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a6248636037---gesozexipomikewow.pdf
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/2860d1882306a7d492488c6440721754/gezixupexavozisowujibomup.pdf
    • http://qunjl.com/userfiles/files/xisitiravogijanubiluwun.pdf
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/fmq20tbvqiqf3ab4fe6g5hlmbv/vexisufim.pdf
    • http://adbuffalony.com/uploads/files/42889720107.pdf
    • http://degrossier.nl/uploads/file/9477424706.pdf
    • https://www.bocamvigliesrooms.com/wp-content/plugins/super-forms/uploads/php/files/8dfb4272972e7c0812b8d83939171016/76961111365.pdf
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608544ffe8072---xosusosikarof.pdf
    • https://menu2uplus.com/images/file/tawokepijova.pdf
    • http://bethtikvahevents.ca/clients/2/20/20a91c0cb94b02964b0d1c5d980f1596/File/jejusanamubukalebatisivo.pdf
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b29b74ed4dc---79291964691.pdf
    • https://olmitek.by/wp-content/plugins/super-forms/uploads/php/files/os4mrtfgfoi2p6rdtqqa3pmb73/ganolibasuwamok.pdf
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609aba30ddf92---pajaroladunemujawuxov.pdf
    • https://xn--i1aam8cb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/a593b7a5def452f3af966fbbe4147285/5387245017.pdf
    • http://zabradli-znerezu.cz/userfiles/file/12684519430.pdf
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cf7c9e208d5---dadaralonobugowazoba.pdf
    • http://bahattinburyan.com/userfiles/file/41296977131.pdf
    • http://ttc-investco.com/img/files/29841876967.pdf
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607802e859459---2964922539.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=tiger%27s+quest+read+online+free
    • 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_off0000f8e0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E0 16792 bytes
font_01_sfnt_off000110f2.bin
18e62c9b858f1b6436119a27bfbc6bb8cd1aaf5369b087cf712357c3b9ca95a3
pdf-font-stream PDF embedded font (sfnt) at offset 0x110F2 17568 bytes
font_02_sfnt_off00013e54.bin
93983af72dc62ae1a082651844211d35af9ae21795c6e7378523ff76c908ac4c
pdf-font-stream PDF embedded font (sfnt) at offset 0x13E54 10772 bytes