Malicious PDF — malware analysis report

Static analysis result for SHA-256 5094cf9509e25b42…

MALICIOUS

PDF

53.3 KB Created: 2020-10-14 19:03:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 745821c4ba8afa93efc85441004f2471 SHA-1: be6745ef79876d10706a390c1d7aa72de550a5ba SHA-256: 5094cf9509e25b42c6479f2b12593e90d0c4c2ebb9a9dd63c444ebb244129776
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF document contains a large number of embedded links, many of which point to external PDF files. One of these links redirects to a known malicious infrastructure, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains text related to 'graphic equalizer apk android', indicating a lure for software downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=graphic+equalizer+apk+android In PDF document text
    • https://site-1038471.mozfiles.com/files/1038471/zuzinusawunugoz.pdfIn PDF document text
    • https://site-1042345.mozfiles.com/files/1042345/46387456053.pdfIn PDF document text
    • https://site-1038548.mozfiles.com/files/1038548/8276686318.pdfIn PDF document text
    • https://site-1042101.mozfiles.com/files/1042101/kefiwuziridaxelijiru.pdfIn PDF document text
    • https://site-1038622.mozfiles.com/files/1038622/92711546268.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366029/normal_5f86f4d01f7bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365570/normal_5f86f928278af.pdfIn PDF document text
    • https://site-1041934.mozfiles.com/files/1041934/21651189741.pdfIn PDF document text
    • https://site-1036689.mozfiles.com/files/1036689/lukefazofalekukakeke.pdfIn PDF document text
    • https://site-1043538.mozfiles.com/files/1043538/35207284942.pdfIn PDF document text
    • https://site-1038489.mozfiles.com/files/1038489/dasutajaxuziboxu.pdfIn PDF document text
    • https://site-1038634.mozfiles.com/files/1038634/62754277633.pdfIn PDF document text
    • https://tavumake.weebly.com/uploads/1/3/2/7/132740551/261add00245.pdfIn PDF document text
    • https://fekudumubaf.weebly.com/uploads/1/3/2/6/132681201/9938143.pdfIn PDF document text
    • https://jeponiruwapin.weebly.com/uploads/1/3/0/7/130776483/bubifapakorubera.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/xenemavurinap_jokepirewiteda_fijalezej_gemewije.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/8386/5506/files/porter_cable_battery_charger_blinking_green.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0458/9620/4442/files/real_wishes_granted_rules.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9679/1456/files/1780237387.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2874/0258/files/red_queen_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/3755/8437/files/37150135371.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/3222/6203/files/tosagujenesivenugi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/2627/1384/files/san_andreas_trophy_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1938/5502/files/mapuvuwizulitapozokukabiw.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_off00008a3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A3F 5256 bytes
SHA-256: a6fa2c2c2bedcf710ffad94731a22046b428aa3c57136ea3d15fdad75da68f2b
font_01_sfnt_off00009c1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C1E 14168 bytes
SHA-256: 70f6e348ea7a91a538bdfedb35d4fcff9a313d9e3f4337bc456bb8cf0c7f5ee2