Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad0ecd41e07d5424…

MALICIOUS

PDF

80.3 KB Created: 2021-03-28 16:30:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3adf16a15baf4954599949e8db1b8dcf SHA-1: d0f2ff100153441a1c47de880c4ca6888ec4c016 SHA-256: ad0ecd41e07d5424bae29a306da9fcd4b37f3505641d5e61a703ffe30fed696d
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 other PDF files, indicating a link farm or phishing operation. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a phishing or malicious redirection scheme, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://fokemale.ru/award?keyword=biodegradable+plastics+and+polymers+pdf
    • http://bet-info.ru/jonawubegapagunaripulasuxrdb3.pdf
    • https://gulipuzajetag.weebly.com/uploads/1/3/5/3/135397689/2008403.pdf
    • http://my-favshopg.online/impossible_quiz_24_answermw0e5.pdf
    • https://gafonubizaragu.weebly.com/uploads/1/3/5/3/135346264/rotafobutofub_gegikunodubaru_kavudobowegod_rozubilamul.pdf
    • http://pukepel.22web.org/rumiwuwajusesomolomuxopa.pdf
    • http://mamafiposorugul.sportsontheweb.net/dugok.pdf
    • https://tuxutumixebapi.weebly.com/uploads/1/3/1/4/131438514/9b9e664c8.pdf
    • http://csxmoney.info/how_to_wash_bobbi_brown_makeup_brusheswxlj1.pdf
    • http://zefujixa.mywebcommunity.org/saxon_phonics_first_grade_worksheets.pdf
    • http://hyipinvest.site/dell_latitude_e6510_price_in_nigerian70x0.pdf
    • http://tekplafond.xyz/how_do_you_calculate_q7r47l.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://wiwowefitupek.epizy.com/dojibaxemibiteralutatubo.pdf
    • https://5c71d6b4-13b5-43a2-97a4-9a0eba4d0f4d.filesusr.com/ugd/0f1814_0d71c0cb60e441d7bf727de1ab1bd8bb.pdf?index=true
    • http://leribilif.rf.gd/jugoxuni.pdf
    • https://6bfd3344-23d3-4e03-ab7d-00c1c23eecf6.filesusr.com/ugd/be19e1_220339c64aa0453984d3eef912f1295e.pdf?index=true
    • https://b6f97e74-198a-461d-a312-d71b9712332b.filesusr.com/ugd/a2d007_904b7955a726449eadbb52cb72b90ab8.pdf?index=true
    • https://5a2ada08-5b6c-402a-b0df-3636415b461e.filesusr.com/ugd/434ae6_c3219f40f4ad4dfd9c885e46b1cb05df.pdf?index=true
    • http://jawuwibunoropo.atwebpages.com/antropologia_fisica.pdf
    • https://6c8ebe11-725c-420b-823a-68bc39d02ad2.filesusr.com/ugd/3e87bf_7912f6f33ede4b4f8c161815fbfadea0.pdf?index=true
    • http://fabedidatifi.onlinewebshop.net/how_to_read_mm_on_a_inch_ruler.pdf
    • https://6776ac3f-883f-499f-bc52-38dff818ec46.filesusr.com/ugd/969751_c2cec42d9241462ea2b78378fbae39ed.pdf?index=true
    • http://niniwakuruvip.rf.gd/67857858134.pdf
    • http://lunodemexixape.epizy.com/islamic_boi_bangla.pdf
    • https://6acf0ca1-aa41-4771-8b91-54baff69ee7f.filesusr.com/ugd/7d1dc9_76878fe5a0da4b4698be5b1466450549.pdf?index=true
    • 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_off0000fc34.bin
8c8c54d62166794c0bf92814a414aec6246abfc813e1833086b26f27da7cd4d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC34 5768 bytes
font_01_sfnt_off00010fcd.bin
14624f365eaa0f84a144b8fd693dde569ee7dc8092d30f88de5a285af48b17c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10FCD 10760 bytes

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