Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0b3f04464edbd3b…

MALICIOUS

PDF

93.6 KB Created: 2021-02-22 01:42:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: ac7271bee504310a86b319a1afdb09a8 SHA-1: 9c72c28a771f923a43cba4994ab28b4b435f5fdc SHA-256: e0b3f04464edbd3b701411f114baeb04c05797b14585b94c16a0b3b06eb1c075
154 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, with one heuristic specifically identifying it as a PDF link farm. One of the embedded URLs, 'https://crophysi.ru/wix?keyword=lynchburg+va+men%2527s+soccer', is flagged as belonging to known malicious redirector infrastructure. While no scripts were explicitly extracted, the nature of the embedded links suggests an attempt to redirect users to malicious sites, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://crophysi.ru/wix?keyword=lynchburg+va+men%2527s+soccer In PDF document text
    • http://labiosdewonda.com/repufuxowopupezunupz8ju6.pdfIn PDF document text
    • https://zemabata.weebly.com/uploads/1/3/4/6/134677216/xejolagovewawute.pdfIn PDF document text
    • https://kevavabine.weebly.com/uploads/1/3/1/4/131406582/varopubizukam_dulel_walimexam.pdfIn PDF document text
    • http://winclean-shop.space/kugojovexogokutapejukafgeoya.pdfIn PDF document text
    • http://fruitslope.online/66846072534j3rwt.pdfIn PDF document text
    • https://gazufasuro.weebly.com/uploads/1/3/4/4/134482956/dazobesoneberi.pdfIn PDF document text
    • http://stankoff.org/84572768974z6dfd.pdfIn PDF document text
    • https://jifofavara.weebly.com/uploads/1/3/4/6/134631997/373582f325743fc.pdfIn PDF document text
    • http://shtampshop.ru/38314016304nv65z.pdfIn PDF document text
    • http://kwini-fini.online/free_sheet_music_for_piano_beginners_disneyglwa6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xaliwalufoguni/xumatiwakep.pdfIn PDF document text
    • https://s3.amazonaws.com/kumasala/roxekugosoroliniwus.pdfIn PDF document text
    • https://s3.amazonaws.com/tisegovofu/pitakix.pdfIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/88491683904.pdfIn PDF document text
    • https://s3.amazonaws.com/futamo/book_creator_android.pdfIn PDF document text
    • https://s3.amazonaws.com/folexapurilowe/85163343360.pdfIn PDF document text
    • https://s3.amazonaws.com/jadudusujuje/fowugakosufolasojigekiku.pdfIn PDF document text
    • https://s3.amazonaws.com/bibejovixapis/darkness_2_ps3_trophy_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/jijumupade/danesenirup.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_off0001334b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1334B 5456 bytes
SHA-256: 7c5a905baf8b0ffbbb67b4b83c60cf90ee9a9ab63264dd141de0d91df71cfe38
font_01_sfnt_off000145cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145CB 10504 bytes
SHA-256: 41f0cdbaa7f87e55279743b38a379a79bd5066d32239fd1dc5f75102e57b63fb

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