Malicious PDF — malware analysis report

Static analysis result for SHA-256 728424efc222c62a…

MALICIOUS

PDF

42.4 KB Created: 2020-10-15 21:08:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 9ab4c01f72b5b81ad394041f00ebc0d7 SHA-1: f93bcce310f85b018d040c33850973a34e76246c SHA-256: 728424efc222c62a12214d6c48f82cf15c52f849d02d75a8205d74f23d47a3d5
184 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links pointing to various websites, including a known malicious redirector. The document body text and heuristics indicate a link farm designed to redirect users to potentially malicious content, likely for phishing or malware distribution. No scripts were extracted, but the embedded URLs and link farm structure are strong indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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 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.
  • 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://ggtraff.ru/pify?keyword=ilovepdf+convert+pdf+to+excel In PDF document text
    • https://femitinekabel.weebly.com/uploads/1/3/1/4/131437683/koduka-manunadiwebawof.pdfIn PDF document text
    • https://tikedamo.weebly.com/uploads/1/3/1/4/131453682/5035688.pdfIn PDF document text
    • https://kekerisasil.weebly.com/uploads/1/3/0/7/130775365/1856924.pdfIn PDF document text
    • https://vodoxuzet.weebly.com/uploads/1/3/2/6/132681632/galel.pdfIn PDF document text
    • https://lipowuripipu.weebly.com/uploads/1/3/1/3/131378852/jefaneboteranu.pdfIn PDF document text
    • https://site-1041387.mozfiles.com/files/1041387/lukigaribelide.pdfIn PDF document text
    • https://site-1042770.mozfiles.com/files/1042770/71987253632.pdfIn PDF document text
    • https://site-1041608.mozfiles.com/files/1041608/tufabatagasurapibatile.pdfIn PDF document text
    • https://site-1040871.mozfiles.com/files/1040871/jenajunibopowate.pdfIn PDF document text
    • https://site-1040426.mozfiles.com/files/1040426/razodova.pdfIn PDF document text
    • https://site-1038927.mozfiles.com/files/1038927/venisevanowuminelupudefa.pdfIn PDF document text
    • https://site-1040041.mozfiles.com/files/1040041/78292377090.pdfIn PDF document text
    • https://mufalugibesenu.weebly.com/uploads/1/3/1/4/131453255/zojajubapejer.pdfIn PDF document text
    • https://papunagaku.weebly.com/uploads/1/3/1/3/131384156/vuzerexokigigoretoti.pdfIn PDF document text
    • https://jewajufigojoxi.weebly.com/uploads/1/3/1/4/131438211/mobafewod.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://uploads.strikinglycdn.com/files/16e8da48-3a4e-4373-8f5f-a2bd5038ec0d/35256640133.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37f96e47-5bf4-45fc-8113-66b5e041480e/nebesepul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0c13333-ac42-4083-a4f8-945fdce4b6fc/73315063721.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b98b334e-99d2-4302-8aaa-22dfe09a0921/bexedosisutowejesasebof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/0863/8106/files/52761163871.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5706/9736/files/40852642222.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/5427/6001/files/lowes_bosch_stud_finder.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/7698/8309/files/chevy_cavalier_repair_manual.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_off00005dc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DC9 4564 bytes
SHA-256: b40e3ce63f11ad0f4671a03b547f0e7b83133903e8eff1bf80a4e6df492da0f7
font_01_sfnt_off00006d58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D58 9580 bytes
SHA-256: 3f4d559de393c152ab3c735481e926128814fed334015f05a5595a0a4d9d5554
font_02_sfnt_off00008e00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E00 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71