Malicious PDF — malware analysis report

Static analysis result for SHA-256 274c3811d5431241…

MALICIOUS

PDF

86.8 KB Created: 2021-03-27 20:44:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 057a9afb80193911fba2cc5582991139 SHA-1: 4a41b3a604a7e737461bc38f88e1e1f2fa7587ce SHA-256: 274c3811d54312413003d35efa0fb2103323d2f1bfc4e87d4a2e45842c3a5bb1
154 Risk Score

Malware Insights

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

The sample was flagged by a machine learning classifier and ClamAV as malicious. It contains embedded URLs, one of which, 'https://crophysi.ru/123?utm_term=elmer%2527+s+glue+all+msds+sheet', is identified as a known malicious redirector. The document body, though heavily obfuscated, suggests a lure related to 'Elmer's glue MSDS sheet', indicating a potential phishing attempt or a pretext to deliver a malicious payload via the embedded link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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/123?utm_term=elmer%2527+s+glue+all+msds+sheet In PDF document text
    • http://jelenus.iblogger.org/17446712549.pdfIn PDF document text
    • http://tijevuwotej.22web.org/how_to_fix_le_error_on_lg_top_load_washer.pdfIn PDF document text
    • https://cdn.sqhk.co/sumefixes/bkagBhd/fosekutimo.pdfIn PDF document text
    • http://ladirojenovezoj.mygamesonline.org/bat_origami.pdfIn PDF document text
    • https://cdn.sqhk.co/mowamukar/ihhh330/31961122459.pdfIn PDF document text
    • http://juluzenaluziwo.22web.org/functions_of_adverb_phrase.pdfIn PDF document text
    • http://fupemagis.mywebcommunity.org/lufelu.pdfIn PDF document text
    • https://cdn.sqhk.co/ruwonumatag/iajagh5/38658091425.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/vovabagubajegeb/maven_setup_in_eclipse_neon.pdfIn PDF document text
    • https://s3.amazonaws.com/mufukep/76645911829.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b2a3d11-6203-4a98-8cdb-84875e4456b5/firefox_48_download_32_bit_filehippo.pdfIn PDF document text
    • http://ladurabazidema.onlinewebshop.net/62737579259.pdfIn PDF document text
    • http://bumitorazefi.epizy.com/thimiru_pudichavan_theme_ringtone.pdfIn PDF document text
    • http://zitasixan.atwebpages.com/how_to_make_a_drill_sergeant_hat_press.pdfIn PDF document text
    • https://s3.amazonaws.com/xaliwalufoguni/some_any_how_much_how_many_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/kofabube/9786433576.pdfIn PDF document text
    • http://nusilelopalal.epizy.com/guidelines_for_food_assistance_in_ohio.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d977f12-d65e-4d65-9ea2-61566a4d26c4/2608121699.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17e2071d-cf20-442f-8a9f-6da1a20fa5e4/nujaperewidurivulaj.pdfIn PDF document text
    • https://s3.amazonaws.com/lanaladu/falcata_tree_planting_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4302d3df-2801-46be-9b3a-3fb2dbfc3aa7/xerox_workcentre_7845_black_toner.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_off000113db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113DB 5228 bytes
SHA-256: 4f774e7e33f0630907d6a385bc9e06ca2fa6dd1ab7e32d20301a6881a471a4f0
font_01_sfnt_off0001257b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1257B 11636 bytes
SHA-256: 2b8398f4608ea25bc48a2b25474c8a4ffcb093c7b822dc7f9277286ed8e403f1

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