Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b56703209b39654…

MALICIOUS

PDF

86.5 KB Created: 2021-07-25 22:04:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 87f26909dc049d7de882c4d1936baee9 SHA-1: 93d3f493e35dcd5f94ceac7b14f29c787277516a SHA-256: 8b56703209b39654351b95e7da94b3ed4a368f2c45decd6bad013e554816a029
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute malicious content or phish for credentials. The presence of numerous unknown URLs hosted on what appear to be compromised or disposable domains reinforces the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/hf43063cpplfkiqae4bblkai8e/65564343214.pdf In PDF document text
    • https://rclurie.com/wp-content/plugins/super-forms/uploads/php/files/22e672054942052953229a2a1c8f37eb/76808163096.pdfIn PDF document text
    • https://likeevent.it/writable/public/userfiles/file/zolujapoput.pdfIn PDF document text
    • http://aroma-es.site/yamituki-n/uploads/files/3879424821.pdfIn PDF document text
    • http://28777886.com/Lpf/UPFILE/userfiles/files/botejifosugu.pdfIn PDF document text
    • http://kristenpell.com/userfiles/files/4415536262.pdfIn PDF document text
    • http://gorisum.net/fckeditor/upload_file/file/88148851557.pdfIn PDF document text
    • http://www.sport-konyv.hu/userfiles/file/zuwimewaketob.pdfIn PDF document text
    • http://shengnabei.com/uploadfile/file///2021062916440771.pdfIn PDF document text
    • https://clifestyle.net/uploades/userfiles/file/27933857098.pdfIn PDF document text
    • http://yuha.be/_files/file/88300060403.pdfIn PDF document text
    • http://learnazia.com/fck/imagesfile/80764533682.pdfIn PDF document text
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/39335896ab74d2d3a723b93829f4377e/vafawotejatijaduvukote.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609743b3a1992---minigakanokuxozuvuka.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/8lu4gk9172dcrf18p5eqek6jt6/filitevokijureva.pdfIn PDF document text
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/1birjs7aia1vnd4d55a0b3mjt2/10439462496.pdfIn PDF document text
    • http://vetportonaccio.it/userfiles/files/48289343203.pdfIn PDF document text
    • http://kpdb.org/userfiles/files/dopilogafofis.pdfIn PDF document text
    • http://vtvxm.vn/userfiles/file/18734552555.pdfIn PDF document text
    • http://bagiez.de/userfiles/file/35981811545.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/7576dfc1349e4d599cc6dd3d171edf4a/wulijofumagiw.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/uso4c1jlh1hia6e1uq4h7veo07/78808029455.pdfIn PDF document text
    • https://davebakeragency.com/wp-content/plugins/super-forms/uploads/php/files/a15e4f5a37723994be3d283a43e19d02/sesilikebufimifadawuzad.pdfIn PDF document text
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/727fbace44d7ee40d0c6956be26857c0/suzim.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e212313e792---vugikat.pdfIn PDF document text
    • http://nfrostov.ru/upload/files/59505256631.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=types+of+id+for+domestic+flightsPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC80 10880 bytes
SHA-256: 7c9373e559d9e3353662f80938b9b8ad4dcf0cd005b4500a2ecd8067d01ff622
font_01_sfnt_off0001057b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1057B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011d8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D8D 17528 bytes
SHA-256: a281646f14f8d6372be63e1b2fe46324cf4a24c359458eb0bfc1211ad42f9993

Open this report in the interactive analyzer, or submit your own file for analysis.