Malicious PDF — malware analysis report

Static analysis result for SHA-256 61015045dc32332f…

MALICIOUS

PDF

94.6 KB Created: 2021-05-26 04:13:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 7eca9da84d74a923a51da7c12b3ddeba SHA-1: 7a65d314c636a7c7690e510a4c317ab959b92ea9 SHA-256: 61015045dc32332fe447a1de949657078aad04b0caa97d90a56392c31dd8cb61
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The presence of a URL with a 'samsung+galaxy+s9+software+update+issues' UTM term indicates a lure related to device updates. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest it's designed to redirect users to malicious or phishing sites, aligning with common phishing and malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://resalured.ru/strik?utm_term=samsung+galaxy+s9+software+update+issues PDF link annotation
    • https://sesifubonimexa.weebly.com/uploads/1/3/5/3/135317238/pegonabutipu-junebuvobipebek-menerademe.pdfIn PDF document text
    • https://jadojojipolukot.weebly.com/uploads/1/3/5/3/135337887/d295c.pdfIn PDF document text
    • https://riledamulobav.weebly.com/uploads/1/3/0/9/130969772/nisof-mezisebenigevel-ragodudamagosi.pdfIn PDF document text
    • https://vusokozederik.weebly.com/uploads/1/3/4/9/134901716/7702082.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365626/normal_600de8169625e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391305/normal_601da07d13043.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414489/normal_6027e5d86970d.pdfIn PDF document text
    • https://vodefuba.weebly.com/uploads/1/3/4/6/134688083/pofepawopuwag.pdfIn PDF document text
    • https://walagewujiw.weebly.com/uploads/1/3/0/9/130968979/95875a214.pdfIn PDF document text
    • https://pojigivawoju.weebly.com/uploads/1/3/5/3/135348152/zonowubowugaveze.pdfIn PDF document text
    • https://kaxitojuwomig.weebly.com/uploads/1/3/5/3/135302818/013a8a.pdfIn PDF document text
    • https://wadomojare.weebly.com/uploads/1/3/4/4/134472746/64be722c42a83e.pdfIn PDF document text
    • https://penixosifa.weebly.com/uploads/1/3/1/4/131482878/555175.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388818/normal_60289e1c9fa37.pdfIn PDF document text
    • https://bisigategisabuv.weebly.com/uploads/1/3/4/8/134884720/libel.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496816/normal_5feb913de75e6.pdfIn PDF document text
    • https://mapetafuje.weebly.com/uploads/1/3/2/7/132741207/perizezuku.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://s3.amazonaws.com/xupovobejanam/fnaf_vr_night_terrors_nightmare_fredbear.pdfIn PDF document text
    • https://s3.amazonaws.com/bezegoluzose/jufepal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83df4b20-0cc5-4a4c-9823-fb16d6846c54/sunofepekawilutapu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25406f30-1988-47a6-9d37-f35da8643856/dutefisunudemad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83e5dc9c-e666-4cd0-ac22-f512f4e21208/sound_card_pci_ht_omega_striker_7.1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33a8241c-f663-4f98-8483-05d659a2b9db/how_to_become_a_successful_personal_trainer_book.pdfIn PDF document text
    • https://s3.amazonaws.com/jukezeluf/hygiene_meaning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7fc484a-e23b-4fe2-b71e-ef16ca822fde/adidas_white_and_rose_gold_watch.pdfIn 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.

FilenameKindSourceSize
font_00_sfnt_off000124aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124AA 5764 bytes
SHA-256: fa3f48fd1940f0dd67449ce144f73209a94d0d7ca4a2e8bec181ce7fd657ce7c
font_01_sfnt_off0001383e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1383E 11304 bytes
SHA-256: cc792f84997af5a4af7f5362f6874598501f07dd21f00ff64508c649595e0393
font_02_sfnt_off00015ea5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15EA5 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3