Malicious PDF — malware analysis report

Static analysis result for SHA-256 2854683230effcee…

MALICIOUS

PDF

85.2 KB Created: 2021-08-14 00:06:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d1927ac30955a7cdc6f06ef59c929b6d SHA-1: ad6da1f6c1aad57db0d7573d7e6a18c82998eaf8 SHA-256: 2854683230effcee58d66a8871a580d56a51bec14121bdfec98fdcc41e005e2e
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Several heuristics point to the PDF acting as a link farm, directing users to compromised WordPress sites and IP addresses, suggesting a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it is designed to exploit vulnerabilities or redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://anthonyellisonfamilyreunion.com/clients/f/ff/ff850d76676c1858bf5e443b7a907d3b/File/22528922007.pdf
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161078f9bd756c---jakajozonezimimagopukimev.pdf
    • https://sardavetri.it/userfiles/file/25846079536.pdf
    • https://acrgroup.nl/userfiles/file/91161448026.pdf
    • https://webupdate.ca/wp-content/plugins/super-forms/uploads/php/files/25ro7dgksttrrrf19baic42vlb/tuvobetu.pdf
    • http://futurepoolandspa.com/ckfinder/userfiles/files/tafeduvokejim.pdf
    • http://haozuowenwang.com/imagefiles/file/70443029163.pdf
    • http://zovsh.com/Uploadfiles/files/8490586403.pdf
    • https://fultoys.com/userfiles/zozaw.pdf
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609e33923a533---10018135091.pdf
    • http://realestatespoznan.com/uploads/43951067862.pdf
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160fe88d090b34---kajagefefupuk.pdf
    • https://africanresearchcenter.com/userfiles/file/minadav.pdf
    • http://bidwoodmachine.com/d/files/jepowifepajetodavalutiw.pdf
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/q72jqvc92is1h8p0es106jm1f3/diraluwidobedip.pdf
    • http://timebymtm.com/upload/files/66994943964.pdf
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089af1691f02---2614165983.pdf
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b7d7d94a0a3---83922412889.pdf
    • http://rzn-house.ru/upload/file/fotil.pdf
    • http://regimhotelierbucuresti.com/images/userfiles/xutusebugaxi.pdf
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/7aa173bda8a7b3251bfe34a09146c397/91232435781.pdf
    • https://topclassgreenery.nl/images/file/gexapomanugan.pdf
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607d13db891de---31582821408.pdf
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/3ci9k6svct8tlk8jrtu6tq8cd2/20560677925.pdf
    • https://xn----9sbccjdbca7cyaieg1a3j.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/d6c05426227f8b54548f98588b1bb4c1/88180223311.pdf
    • https://poldercuptrofee.nl/site/admin/ckfinder/userfilesfiles/xatun.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=mamas+and+papas+barnaby+button+bouncer+instructions
    • 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_off0000e63d.bin
0f7f57fca47f43cb7daefec1885e1009aa57b080ac4402a9a189373a70381aa5
pdf-font-stream PDF embedded font (sfnt) at offset 0xE63D 17900 bytes
font_01_sfnt_off0001148c.bin
e3f2b3516da4ca2464f1a91c6dc6b155394a78925f727c44a3953136c5daa9ec
pdf-font-stream PDF embedded font (sfnt) at offset 0x1148C 10976 bytes
font_02_sfnt_off00012dd3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12DD3 16792 bytes