PDF malware analysis — malicious · bac1537e286b51b0

MALICIOUS

PDF

79.1 KB Created: 2021-03-25 22:06:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21

MD5: 989a5e070daac4ebac658a60b070f51e SHA-1: 6859c57548becf814506dcff75c83e0fbcdda40d SHA-256: bac1537e286b51b046ead905d42221d06db2df3ab1aa4182127ca82b5402fad4

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains an embedded URL that redirects to a domain associated with malicious activity, likely serving as a lure for the user to click. The document's structure and embedded content suggest it is designed to exploit user trust by masquerading as a legitimate service letter.

Machine Learning

Nyx PDF Classifier malicious score 0.9991

Heuristics 5

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://soxebez.ru/strik?utm_term=certificate+of+service+letter+template PDF link annotation
- http://xuzotudaraderuf.mypressonline.com/101_bible_contradictions.pdfIn PDF document text
- http://vodabutopidaru.getenjoyment.net/gisizefudaroxuxobefaxofe.pdfIn PDF document text
- http://kakorixow.mygamesonline.org/82182894018.pdfIn PDF document text
- https://cdn.sqhk.co/goluxewimabu/jihPhjd/wibijegufeborefap.pdfIn PDF document text
- http://piwulag.sportsontheweb.net/how_does_absorbance_change_with_concentration.pdfIn PDF document text
- http://kozugufasuroti.mygamesonline.org/famufoga.pdfIn PDF document text
- https://cdn.sqhk.co/jimumakevaji/iijetiG/mudilusuteparozenu.pdfIn PDF document text
- http://tapozifokun.mywebcommunity.org/g_shock_mudman_watch_band.pdfIn PDF document text
- http://kudusakepupa.sportsontheweb.net/kettlebell_core_exercises.pdfIn PDF document text
- https://cdn.sqhk.co/vopofuxo/gPiRscn/mujelekerimetuzojeraboxu.pdfIn PDF document text
- http://bikejesoxatelo.mygamesonline.org/gojumik.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.daltonmaag.com/In PDF document text
- https://288c7b4b-0494-48f6-8ee2-9dd519b96b0a.filesusr.com/ugd/a107db_03acf700348643659331194947cd785f.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/piwanisaj/8483641604.pdfIn PDF document text
- https://f87ce62f-3d5d-4c42-bff3-2e7d00444551.filesusr.com/ugd/72ed28_e6e38ed0de2a4293a273ecfec5e6a82d.pdf?index=trueIn PDF document text
- http://suruliloxapesas.myartsonline.com/apparel_industry_in_sri_lanka_2020.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/6eb9fed5-5109-4354-8e1e-2931fc11b937/bibatudafoxima.pdfIn PDF document text
- https://4ef57e19-9a2e-4e6f-a444-f6b59f982a39.filesusr.com/ugd/4c1554_9b46dd6c477c41ec80d6f0b9ba314ab6.pdf?index=trueIn PDF document text
- http://rulamiji.onlinewebshop.net/rakaratefuju.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/151c390c-07d3-461e-9e10-88862f2a9aa1/biduraregazoloxovowaw.pdfIn PDF document text
- https://s3.amazonaws.com/paropabaru/carry_on_jatta_2_movies_full.pdfIn PDF document text
- https://s3.amazonaws.com/falufusu/90213394092.pdfIn PDF document text
- https://s3.amazonaws.com/mudurixo/87474036690.pdfIn PDF document text
- https://2e4d99de-9d37-4ce2-abd5-0bbccafdbe51.filesusr.com/ugd/33a2e4_2418ae80fd064e238536acf4f15b926a.pdf?index=trueIn PDF document text
- 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000ec36.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEC36	4928 bytes
SHA-256: `7d6d3bcc00fbb4b698e51fd477c9f1f7669a936ed49b15f157db5a791d48ace9`
`font_01_sfnt_off0000fcfa.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFCFA	10544 bytes
SHA-256: `8a2be72b66e654c4f16085fc4ce4f92d1c0a5c568f05e425fc9cea68f7952a2f`
`font_02_sfnt_off000120d2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x120D2	4324 bytes
SHA-256: `1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361`

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