Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee33c04d44768acf…

MALICIOUS

PDF

81.5 KB Created: 2021-03-07 19:42:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 5bb1890aae29dfeff8838c57861aa6c0 SHA-1: cf5455610d699552e0ebeded678d37dfbb8a897c SHA-256: ee33c04d44768acf4a5e985d079b259eceab26d55644217ee778bf557bd80237
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs pointing to disposable domains, a characteristic of link farms used for phishing or distributing further malware. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags this behavior. While no scripts were extracted, the high ML confidence score and the nature of the URLs strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://seumenha.ru/wix?keyword=cinnamon+rabbit+personality PDF link annotation
    • http://zaliv2k20wowowowoow.xyz/78088217555t4ir.pdfIn PDF document text
    • http://xizerunax.scienceontheweb.net/waiting_for_the_barbarians_plot_summary.pdfIn PDF document text
    • http://ig-support-service.com/137486324046hbpr.pdfIn PDF document text
    • http://particulieres-societegenerale.best/1641904029z6kff.pdfIn PDF document text
    • http://epipog.com/baby_gate_for_stairs_with_metal_banister_on_one_side2pfdp.pdfIn PDF document text
    • https://cdn.sqhk.co/mosugukasiba/Zhdjjgi/xcraft_drones_net_worth_2019.pdfIn PDF document text
    • http://sandiego-podcasts.com/51849092259b5kyx.pdfIn PDF document text
    • https://cdn.sqhk.co/kubepugemaki/2kGghie/wovopuvopadadeb.pdfIn PDF document text
    • http://duzusedolatepe.mypressonline.com/list_of_trig_integrals.pdfIn PDF document text
    • http://razvivatel.blog/determine_the_moment_of_inertia_of_the_area_about_the_y_axis._4yx2utzyw.pdfIn PDF document text
    • http://hisgohar.site/47160681315xn7sq.pdfIn PDF document text
    • http://cashthe.ru/84862521544ge92e.pdfIn PDF document text
    • https://cdn.sqhk.co/limizolaxa/icc6Ujh/golden_globes_viewers_2020.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/kakekojezutok/how_to_calibrate_hayward_salt_cell.pdfIn PDF document text
    • http://titugol.atwebpages.com/why_do_mathematicians_hate_physicists.pdfIn PDF document text
    • https://s3.amazonaws.com/sirilagewuga/blank_handwriting_worksheets_for_1st_grade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22bd15f9-1ea2-4b9b-8f06-dddf13f6a5d5/votujusafalefibibanukuga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18148054-6399-4375-9dcc-45fbf5e90b18/fisukozi.pdfIn PDF document text
    • http://vubelifijam.atwebpages.com/20006646513.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_off0000f6c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6C5 5020 bytes
SHA-256: 9cc21fa61909e4fc80547a4bae723b4eb208ec4f019a04f86f76238d0817e49a
font_01_sfnt_off000107b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107B6 10240 bytes
SHA-256: 62b2c6690d82d37d381d2c0217df40dfdd8386885337e01d0f4fb81b5502f0e0
font_02_sfnt_off00012acb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ACB 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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