Malicious PDF — malware analysis report

Static analysis result for SHA-256 044dd17198b1ba89…

MALICIOUS

PDF

81.4 KB Created: 2021-09-15 02:27:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: a13135339048a1a027a2f73ec37ee751 SHA-1: aac1b5f1c63c23b6a28ff35def7b1c57cc87ac32 SHA-256: 044dd17198b1ba8988fa716bbd6abd9b389f5d7f2835ea93b6f132690d91875b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, with a significant number pointing to disposable hosting and exhibiting link farm characteristics. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of external URIs suggests the PDF is intended to redirect users to malicious websites, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 5

  • 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 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://pixomot.ru/uplcv?utm_term=max+payne+2+ios PDF link annotation
    • http://animalscipublisher.com/files/upfiles/file/rojadodiresegutelegek.pdfIn PDF document text
    • http://jshtextile.com/UserFiles/file///6520539800.pdfIn PDF document text
    • http://anipetkingdom.com/webroot/img/files/fefiwawiduzewodaxoniju.pdfIn PDF document text
    • http://fazendasaojudastadeu.net/fotosempresa/files/18502413612.pdfIn PDF document text
    • http://igigeothermal.jp/userfiles/file/23897041343.pdfIn PDF document text
    • https://vanphongphamhienluong.com/upload/files/xoxizixazas.pdfIn PDF document text
    • http://alphamarino.kz/images/news/file/51634051934.pdfIn PDF document text
    • https://santa.sg/images/users/00000000/files/bugonaxomutejigilut.pdfIn PDF document text
    • http://fijiembajak.com/uploads/ck_uploads/files/62526624249.pdfIn PDF document text
    • http://currycornersugarland.com/admin/images/file/kaxadevokewesu.pdfIn PDF document text
    • http://kantoromega.pl/userfiles/file/tidoluwaxomesav.pdfIn PDF document text
    • https://absoluteanytime.com/media_file/files/files/43517889027.pdfIn PDF document text
    • http://leicesterbiketec.com/userfiles/file/setixanido.pdfIn PDF document text
    • https://tanthueviet.vn/img_data/files/sopekimanurufibe.pdfIn PDF document text
    • https://studiecarriere.it/uploads/file/58150206653.pdfIn PDF document text
    • https://bursac.net/userfiles/file/sijalozebemiku.pdfIn PDF document text
    • http://progettogeometra.it/userfiles/files/82724182231.pdfIn PDF document text
    • http://lnhaihui.com/userfiles/file/20210904052312_1635600244.pdfIn PDF document text
    • https://menu2uplus.com/images/file/79264043977.pdfIn PDF document text
    • http://stavebnevyrobky.sk/www/upload/files/supafa.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130a44b5812a---49466369228.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/6vt2p3bokiaon8ke1u252fnull/xurugonebigozetaniw.pdfIn PDF document text
    • http://langmypham.com/luutru/files/fadewajepaluvezukazozo.pdfIn PDF document text
    • http://acsalma.hu/userfiles/files/69899283919.pdfIn PDF document text
    • https://path.mn/userfiles/files/nifibigodovonasowajen.pdfIn PDF document text
    • https://b2cdemo.tickets.com/content/files/77523415101.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://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_off0000d4bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4BD 19308 bytes
SHA-256: f32fca69eeb38d3f7d691e244092eb5709f3544ec87b42e393f2c77851c070e6
font_01_sfnt_off00010691.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10691 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011ea8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EA8 10328 bytes
SHA-256: bfdf448e77474184a2657505519004c0bac0eb130b54ac90668de856c7aa483c

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