Malicious PDF — malware analysis report

Static analysis result for SHA-256 178680fff1f3b97d…

MALICIOUS

PDF

80.9 KB Created: 2021-03-17 04:06:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 3b772c607e0c0274ac5dec69a097ef59 SHA-1: 5edb2a13cb3e39eef0d9a12d07bcbaf23367cce2 SHA-256: 178680fff1f3b97d994c5b4f30c2a1512112b2d5be9ef8fbeae8eee91b9fcf8c
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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/award?keyword=spring+boot+batch+tutorial+pdf PDF link annotation
    • http://wijetaz.mypressonline.com/how_to_train_your_dragon_homecoming_full_movie_release_date.pdfIn PDF document text
    • https://cdn.sqhk.co/noxisoture/ieGdja5/samsung_coins_payment_apple.pdfIn PDF document text
    • https://rotarivinevi.weebly.com/uploads/1/3/4/5/134599250/886b1bcf9e.pdfIn PDF document text
    • http://tumbaa.space/acca_past_questions_p70tb7b.pdfIn PDF document text
    • https://cdn.sqhk.co/siwowoso/6Qgg0ja/asphalt_8_online.pdfIn PDF document text
    • http://jajuviramigawo.medianewsonline.com/4598266483.pdfIn PDF document text
    • https://mojavopadagesit.weebly.com/uploads/1/3/5/3/135383036/tabupe-liwasigej-napiziwasiw-kulavorejarik.pdfIn PDF document text
    • http://znakomstva18x.site/why_is_my_kitchenaid_ice_maker_not_making_ice0ugia.pdfIn PDF document text
    • http://arthromedro.xyz/246154404726old4.pdfIn PDF document text
    • https://cdn.sqhk.co/jawuraxexije/hdhdiez/dead_cells_xbox_one_game_pass.pdfIn PDF document text
    • https://cdn.sqhk.co/dusivubeleza/cDZjaNH/modafer.pdfIn PDF document text
    • https://cdn.sqhk.co/mogizilo/iiLhejc/60246241664.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tevigotu/lemikeladeromume.pdfIn PDF document text
    • https://s3.amazonaws.com/tixeligufokup/cisco_switch_sg350x_datasheet.pdfIn PDF document text
    • https://s3.amazonaws.com/godoremitiwuja/xovamitufogumuwijejeloke.pdfIn PDF document text
    • https://s3.amazonaws.com/lonozote/sinonimo_de_conforme_se_verifica.pdfIn PDF document text
    • https://bcd7deca-fd5d-492b-a220-d373ca515bc9.filesusr.com/ugd/12f4eb_01e89b78ad174d7d92e0c157f0c6bb7e.pdf?index=trueIn PDF document text
    • https://50fe66f1-00be-429c-ab6c-57a9f80d6ab9.filesusr.com/ugd/39cb9d_a4c8143e418e4b8393a28fbe1a27c25c.pdf?index=trueIn PDF document text
    • https://183df7f2-4185-4ca0-bfcc-33b39bc842f1.filesusr.com/ugd/9ac34a_7c1e41b7e7484096bc97f7df5f83a249.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fajixe/sixamuvukizefoxutunuvoj.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB44 5484 bytes
SHA-256: 0c2d5beedbb039a150f0213d483cec3dca54d0cf7dccb94cd6557383fabfd0ca
font_01_sfnt_off00010de1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DE1 11940 bytes
SHA-256: 1ba6793f4d7a4125bacadefc40834a4235d43c0ca1208d69cacfed7ccd53eadc

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