Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d95854f8cfb5b6c…

MALICIOUS

PDF

97.7 KB Created: 2021-05-14 20:01:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: be7a5fe325007fb828188450b2e4c563 SHA-1: cc11a342d568432f1a040aed4c16124b3f1b6b3e SHA-256: 4d95854f8cfb5b6c3d02532bd77478f63b9dda23c682ac5bc693b7f1609e2fa2
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a PDF link farm designed to direct users to various websites. The embedded URLs and the heuristic firings strongly suggest a phishing or malware distribution attempt, masquerading as a movie download. No scripts were extracted, but the PDF structure itself facilitates the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://fokemale.ru/strik?utm_term=the+maze+runner+2+free+full+movie PDF link annotation
    • http://sabovibin.medianewsonline.com/autobiography_sample.pdfIn PDF document text
    • http://bazunujovi.scienceontheweb.net/98146785056.pdfIn PDF document text
    • http://servempieza.site/conquest_of_empires_appleton_cottagedfcns.pdfIn PDF document text
    • http://6gusevshop.space/chrisley_knows_best_season_4_episode_guidep61ts.pdfIn PDF document text
    • http://vknacruckalaikov123.xyz/silefodarezmtdn4.pdfIn PDF document text
    • http://nizavevorupuj.mywebcommunity.org/90116126002.pdfIn PDF document text
    • http://rexuwoxaga.sportsontheweb.net/42174248066.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/vovabagubajegeb/auto_images_in_outlook_2016.pdfIn PDF document text
    • https://s3.amazonaws.com/tozaduliwubega/bukimazevetewop.pdfIn PDF document text
    • https://s3.amazonaws.com/fajetufekejo/timex_expedition_indiglo_wr_50m_review.pdfIn PDF document text
    • https://3ff4c494-4984-418a-b709-7a5c611cca0a.filesusr.com/ugd/adbee0_d40e6211715c475aa8d16e77dcc0477f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xuxifuzituwu/73107290093.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7621b61-39e0-45c2-9638-7d11dd65c8da/wamufomumuwofuxifigado.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63a5a5cf-04c5-4fde-b409-66a01f162ecb/how_to_make_homemade_breakfast_bars.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e210596b-ab50-44a8-b8cd-7d582f8825b7/stress_management_worksheets_for_middle_school.pdfIn PDF document text
    • https://6e7ef639-f89a-4701-86f9-710a836f1183.filesusr.com/ugd/12745a_7ddebf89158e4be39141ebbfbf601ccf.pdf?index=trueIn PDF document text
    • https://8569cc17-8b2a-4187-ace0-95b0550b99f0.filesusr.com/ugd/d6eede_02b7bb794c504cdda5cb80aa35e055ad.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gezetega/a_feast_for_crows_chapter_40.pdfIn PDF document text
    • https://s3.amazonaws.com/levumoduf/66642891161.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf70e79a-54f8-4b5f-9970-520bcfcafcdb/dyson_dc58_battery_problems.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_off00013284.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13284 4820 bytes
SHA-256: fee2929fb89a8597b582fab3ba49b480e1da40a5355a55a27614b1f4278dc39d
font_01_sfnt_off000142be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142BE 11800 bytes
SHA-256: 97090304fec26ed57143f41e490ffeaa664986b661b0644496577f86b14f2c31
font_02_sfnt_off00016aca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16ACA 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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