Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee5a855184ec2718…

MALICIOUS

PDF

87.7 KB Created: 2021-03-27 18:22:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 23bc7ff6c3a4a824dd8ebd516aac7504 SHA-1: e897de618456d3de1083da776a170b20f102eb7d SHA-256: ee5a855184ec27188f40a469d62ecdd082f8bbb240e810ed763591b2dadbe0a6
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are part of a link farm designed to appear as search results for various queries, including 'the giver accelerated reader test answers'. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://jacksth.ru/wix?keyword=the+giver+accelerated+reader+test+answers
    • https://cdn.sqhk.co/dajebala/jiEpbjf/funny_videos_of_cats_and_dogs_dancing.pdf
    • https://cdn.sqhk.co/zezoxomop/dCgfghT/subterfuge_phonetic_pronunciation.pdf
    • http://italywow.info/16095236833yxc2e.pdf
    • https://cdn.sqhk.co/vopofuxo/ijc2xhb/paw_patrol_rescue_run_app.pdf
    • https://dalatomim.weebly.com/uploads/1/3/4/3/134344090/boxusuge.pdf
    • https://nisazixipa.weebly.com/uploads/1/3/0/7/130775104/xivoreni.pdf
    • http://segway-wheelchair.ru/bosch_nexxt_500_series_gas_dryer_manuali03ad.pdf
    • https://nugumogixowujo.weebly.com/uploads/1/3/1/4/131437940/1551097.pdf
    • http://stankovit.ru/mini_dapple_dachshund_puppies_for_sale_in_illinoist5155.pdf
    • https://cdn.sqhk.co/batumozi/AghVfhg/jowawudi.pdf
    • http://luminar3-download.xyz/66253312674386q6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/135fb9f9-d616-4a84-97b2-9da1df5815a6/wabikopakevotowo.pdf
    • https://uploads.strikinglycdn.com/files/77223779-1256-4065-8ba9-2f2a95b1c134/fasobagenigekekisefov.pdf
    • https://uploads.strikinglycdn.com/files/1a6a51b5-7568-438a-9635-49e48f1dca9c/70025718561.pdf
    • https://s3.amazonaws.com/zulezov/61420339867.pdf
    • https://s3.amazonaws.com/tesapibebujep/92706798457.pdf
    • http://mujebik.atwebpages.com/91281801493.pdf
    • https://uploads.strikinglycdn.com/files/d3da2c9a-f7bc-480c-b573-25b6499b10dc/best_short_stories_mark_twain.pdf
    • http://gototura.myartsonline.com/42136360145.pdf
    • https://s3.amazonaws.com/minabiwa/libro_el_caballero_de_la_armadura_oxidada_capitulo_1.pdf
    • https://uploads.strikinglycdn.com/files/73ab08db-cb26-400f-937b-3edf3eebfa4b/70753880609.pdf
    • http://rupesujutiwu.myartsonline.com/mibimazikajaf.pdf
    • https://s3.amazonaws.com/rorives/vuwaxifopon.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010072.bin
788f43128f4f29a98f6eb7c0210638b630488153bb40476fab5a0e3cf62488d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10072 5304 bytes
font_01_sfnt_off0001128b.bin
ec38067b04249a686348c068a35bf8973b7248d3d04148705f1c64ed4f26f866		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1128B 11844 bytes
font_02_sfnt_off00013b38.bin
31aa257675234f953cb39254c73a0c002637764ec2691c470e0912636c3685cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13B38 16204 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.