Malicious PDF — malware analysis report

Static analysis result for SHA-256 10e45153f7c8b97a…

MALICIOUS

PDF

82.1 KB Created: 2021-08-16 03:14:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f2bc1437940e28449aedcf0e9b804ef3 SHA-1: 25f134c647b919b057c8a40c0982f1019e54a27c SHA-256: 10e45153f7c8b97ae8797ca98c1599008460959bb1cd175cc0ac13189874f649
164 Risk Score

Malware Insights

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

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to compromised websites, suggesting a phishing or malware distribution scheme. The presence of a 'download button' heuristic further supports the attack pattern of luring users to download malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://morethancleaningservices.com/wp-content/plugins/super-forms/uploads/php/files/e9576bf4bccf76cb092c293e189ec5b0/pixikixonaxosawinev.pdf
    • http://king-ber.com/UploadFiles/file/20210731024421278.pdf
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084dd474b88b---narobivarixovimezevimaz.pdf
    • http://aliguoriarchitetto.eu/userfiles/files/pasiboruvirofaxojil.pdf
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/c44bf8483d41347e9020775c03cc3610/73534545932.pdf
    • https://laserbeautymachine.net/d/files/13996054234.pdf
    • http://gerd-pollak.de/userfiles/file/97392473101.pdf
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072255908d6e---49982506815.pdf
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160afda232e6d1---11604889863.pdf
    • http://emanuelmlevin.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/duwovotagutiwise.pdf
    • http://goldcoil.com/uploadfiles/files/vajuxalogunimaja.pdf
    • http://greece-ex.com/images/blog//file/dagaxekarij.pdf
    • http://10glazsikeyrosa.ru/file/90132509603.pdf
    • http://cbcom.eu/ressource/site-image/files/referidudapitimopaj.pdf
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/7v967hs95v9nu9cp2t7j4num92/winodubudulurorinabe.pdf
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/f8da6d6d4d03fb24603b48547937e8d9/86004967399.pdf
    • https://salubrismd.com/wp-content/plugins/super-forms/uploads/php/files/ef3e3a3234dddf85b1e1cf6ceb4b10e6/71141445912.pdf
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092f9fd8af91---kajopukosebusima.pdf
    • http://hsound.ro/images/custom/file/lidatujupukopov.pdf
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608dfadc69605---82235599542.pdf
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/827c5c7f11a5828462c5ebc2171d2824/24420686972.pdf
    • https://singlespeed-switzerland.ch/userfiles/files/tugaxifazoruzawigojawa.pdf
    • http://andlupa.com/userfiles/file/95856846960.pdf
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093d24e26161---ruboxudiburupiwiforanim.pdf
    • http://biosafety.biz/ckfinder/userfiles/files/juzuvijuguwi.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=essential+biology+for+cambridge+igcse+online
    • 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_off0000daeb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDAEB 16792 bytes
font_01_sfnt_off0000f2fd.bin
e624591ce7fe08be2d9b30d1612bb018f89474fec79bc4e2107fb95345341915
pdf-font-stream PDF embedded font (sfnt) at offset 0xF2FD 17292 bytes
font_02_sfnt_off0001202a.bin
7dc43d8228d2656447d965a02003ba09bca7df9ee2b84baedb1f68bdd03788d7
pdf-font-stream PDF embedded font (sfnt) at offset 0x1202A 11056 bytes