Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae046fa9cc2d83a9…

MALICIOUS

PDF

82.3 KB Created: 2021-04-04 04:45:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 9a149edd0c2ecced30db63be9c5f4603 SHA-1: cc3ee0da0f635c1ccaee54e6baa898aa88752c88 SHA-256: ae046fa9cc2d83a9145a502ca31e27cc5f8ef5e9374e380d6e892d58f9f9184d
184 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical finding for linking to known malicious redirector infrastructure. The embedded URLs suggest a phishing or scam attempt, masquerading as a book download to entice users to click through to potentially harmful sites. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://dafemum.ru/award?keyword=band+of+brothers+full+book+pdf In PDF document text
    • https://static.s123-cdn-static.com/uploads/4376619/normal_5fed1f5822d5c.pdfIn PDF document text
    • http://bestunew.xyz/the_book_thief_by_markus_zusak_read_onlinev7z21.pdfIn PDF document text
    • https://vagepawesiger.weebly.com/uploads/1/3/4/5/134516176/178937a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465537/normal_606911632332c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402948/normal_5fe0bc46ef05a.pdfIn PDF document text
    • https://zokatitolef.weebly.com/uploads/1/3/4/7/134702636/ec98550.pdfIn PDF document text
    • http://reduslimitalia-official.site/bawitujukaxisijiwuttojwv.pdfIn PDF document text
    • http://eurozone.pro/43206971704rtdt.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370265/normal_6012536a6d4fc.pdfIn PDF document text
    • http://rm-swis-mine.com/manual_of_chess_combinationswr331.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383801/normal_601aa3450ef9b.pdfIn PDF document text
    • http://lianhua.life/17556354119qpgfx.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ea7191c-c480-48c1-a5e9-3108ee43b0c4/talend_mdm_user_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2adc407a-bcb5-4d16-bcb1-6bd429e9647a/como_ganar_amigos_e_influir_sobre_las_personas_libro.pdfIn PDF document text
    • https://92fbd7ca-8480-4723-bb2c-19523f9dca15.filesusr.com/ugd/29946e_4fd1760e015743b181dc86db6a3cf02a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/588bc7d5-51ba-4522-9c7e-b1b9320a3b05/percy_jackson_greek_gods_read_online_full_book_free.pdfIn PDF document text
    • https://b3079848-b07e-4d89-9244-05dfa5dd91fe.filesusr.com/ugd/3ab5ed_da79422f8e6a46b49b09f06d5d3f1c46.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sejakopa/turegetikogan.pdfIn PDF document text
    • https://s3.amazonaws.com/gozifep/dead_by_daylight_mobile_latest_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe5af0cd-26a7-4068-8ecc-20ea65025ad9/n23h22nh3_how_many_molecules.pdfIn PDF document text
    • https://s3.amazonaws.com/vufupu/landscape_painting_watercolor.pdfIn PDF document text
    • https://023e3b0e-89aa-4e00-bd19-175c11a0a9c0.filesusr.com/ugd/5f4883_de9e8d645fd4438393937b86191a40e8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vonuxagupeduze/nopuzovamogaruwelof.pdfIn PDF document text
    • https://s3.amazonaws.com/jidagafinuxesu/cant_find_subscribe_button_on_twitch.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_off00010302.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10302 5384 bytes
SHA-256: a25cdb0e17db1f819adb83ec1dca0b76fdd0b1dcf590ba02ac2d80d76ce915c2
font_01_sfnt_off00011544.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11544 11368 bytes
SHA-256: 73b3c960d8ab6cfcf6707342a0e1df796be2f1c008de4c664629af32191281a0