Malicious PDF — malware analysis report

Static analysis result for SHA-256 6206bd8857bef2e4…

MALICIOUS

PDF

96.9 KB Created: 2021-03-23 19:20:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 55e1ed3bdca570f9e4fa616e6ba0b4bf SHA-1: 7efd646a8cb6bc091b1062d89ba236544784bda0 SHA-256: 6206bd8857bef2e40111b316664345bc783341dbed8c067f1e8c5fd218ac33ed
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to potentially malicious domains, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier and ClamAV also flagged this file as malicious, specifically as a phishing trojan. While no scripts were directly extracted, the presence of numerous external links suggests an attempt to redirect users to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://golowaki.ru/123?utm_term=basics+of+aerial+photography+pdf
    • https://fanakigefepawaf.weebly.com/uploads/1/3/0/8/130873796/puziz.pdf
    • http://vudujupuboneg.22web.org/flannel_board_story_templates.pdf
    • http://spainwow.pro/how_would_the_world_be_different_if_pangea_still_existeddjts8.pdf
    • https://jidedenevunuva.weebly.com/uploads/1/3/4/4/134498736/zonopurixa_zarobubopipir.pdf
    • http://8bitbeardsco.com/new_baby_images_free2wwb5.pdf
    • http://disconto50.pro/wish_bracelets_color_meanings4ws9p.pdf
    • https://luwupedo.weebly.com/uploads/1/3/1/3/131383743/6736a95c7d4.pdf
    • https://texoxarisozitew.weebly.com/uploads/1/3/0/9/130969357/sowewo_batiborutane.pdf
    • https://nopiviwefimak.weebly.com/uploads/1/3/4/7/134708781/8cbded4.pdf
    • http://ridunculus.com/pazozilawugesemomerawirik14p3u.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://bb0106b8-f3e0-414b-a873-a0e24df3f2ad.filesusr.com/ugd/b84a33_3176d0d70ac9440cacd270d1577242a7.pdf?index=true
    • https://af18ad75-7652-4b25-b9e0-8da5fded0af1.filesusr.com/ugd/529385_050627822622486c8694825c48e59ff8.pdf?index=true
    • https://4c72699b-aa2e-4dc8-8bd5-1a54e8f938a6.filesusr.com/ugd/f3cb45_a50efd3905e041ab9ca7abe554cafa6a.pdf?index=true
    • http://sazovenofejeji.rf.gd/oppositional_defiant_disorder_questionnaire.pdf
    • https://c63ca81c-6df4-4ec3-bc2e-8508f29a6879.filesusr.com/ugd/d48fe3_5823cfa3c14c4914b6cc04196ab5e52d.pdf?index=true
    • https://cb6d8354-940b-4e05-9f1d-0150973ab277.filesusr.com/ugd/882da0_10256699e36b4e0b833b21472810b5f8.pdf?index=true
    • https://9de673a2-3b8e-40eb-bbf5-c0ad8e71a3da.filesusr.com/ugd/bd5c68_f0b1e4ce8d2544dfac8f569c2866cde1.pdf?index=true
    • https://eff7b67d-fef5-45b7-bcd6-ffb1b71d3a14.filesusr.com/ugd/b4c9df_370cda448b7a4a2f99967738e5578505.pdf?index=true
    • https://9a4b5e96-23fe-4021-9525-787506808755.filesusr.com/ugd/b3318b_095f996d57d64759abbfe67c59fc97b6.pdf?index=true
    • https://36622f5a-5a1b-41a5-aa98-965156e47ac2.filesusr.com/ugd/804ff6_95ccf278344443d2a860f58ee4997dd0.pdf?index=true
    • http://zesuzirer.rf.gd/47087335139.pdf
    • https://78e27e65-9996-4239-a63d-7a21722db537.filesusr.com/ugd/03f576_73c1216998c74ceba8444a01c986b9fc.pdf?index=true
    • https://9c3086b9-336b-4a4d-b39c-975a2563a2e0.filesusr.com/ugd/f4f792_b17923238e364a658ba1455065ee5290.pdf?index=true
    • http://vogidide.epizy.com/14198118138.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013ba8.bin
0ad288376c879b34c07d2c39e0c97938bc1920c8d0cc4a1b413f85d1fee56035		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13BA8 5568 bytes
font_01_sfnt_off00014e9b.bin
19791f6365c5eca44915151a896589da6dd88787291302609c9de2badf9f627a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14E9B 11892 bytes

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