Malicious PDF — malware analysis report

Static analysis result for SHA-256 598770bbfb88f9ab…

MALICIOUS

PDF

73.0 KB Created: 2021-03-21 00:34:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 928de2cf1746989833ebacb2518d3469 SHA-1: 2547519c7c52c823885fbc68609e96fcf824ebaf SHA-256: 598770bbfb88f9ab657e6e15fafe30f66bc3416c0412404fb034dff2197385e7
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, directing users to 'https://crophysi.ru/123?utm_term=formal+and+informal+commands+spanishdict'. This indicates a phishing attempt to lure users to a malicious site. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of embedded URLs and the redirector link strongly suggest a phishing attack.

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=formal+and+informal+commands+spanishdict In PDF document text
    • https://sesogipe.weebly.com/uploads/1/3/1/4/131438268/3790982.pdfIn PDF document text
    • http://counterman.ru/48064657100rofcx.pdfIn PDF document text
    • https://vapasunodisina.weebly.com/uploads/1/3/0/8/130873802/2266060.pdfIn PDF document text
    • http://metalllift.ru/46472899262jvr3y.pdfIn PDF document text
    • https://lumixiwutetus.weebly.com/uploads/1/3/4/3/134388296/diloxub_suwotexizobama_vawenonowaxek_kosedunavigufix.pdfIn PDF document text
    • http://topplafond.xyz/xomijerorevafo5ntqa.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/navoburarovada/25547002920.pdfIn PDF document text
    • https://s3.amazonaws.com/fadadedezeker/tv_guide_ireland_sky.pdfIn PDF document text
    • https://s3.amazonaws.com/zibenoroduzuw/93663032608.pdfIn PDF document text
    • https://50b44c92-959e-4a15-bf83-93d6b2b518d6.filesusr.com/ugd/3ed44c_6fc8676124e745faaa651ab0827871f0.pdf?index=trueIn PDF document text
    • https://21e323bd-7fdd-46e9-a6c7-4880e76d7610.filesusr.com/ugd/0a51c1_94f84cde29d3412bb01fcfd5430d25e0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kawotexulozax/kipisadepilonasisuvezu.pdfIn PDF document text
    • https://s3.amazonaws.com/goviwigax/vigujafup.pdfIn PDF document text
    • https://69a21580-3c80-4f81-8097-1ec0bc18215d.filesusr.com/ugd/bd7df1_29dd586ba6af4b13b5c421c14b65b9f6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fibesezati/brilliant_legacy_eng_sub_free.pdfIn PDF document text
    • https://00407fa8-a9ef-4b78-9bbe-46147fc8acf6.filesusr.com/ugd/5ecadc_73ac670635f9409084afe8cca7cab7bc.pdf?index=trueIn PDF document text
    • http://nofadokar.rf.gd/heads_up_email_template.pdfIn PDF document text
    • https://s3.amazonaws.com/kavugusepe/disney_fake_book_free.pdfIn PDF document text
    • http://wokonudiru.epizy.com/can_you_share_a_post_from_linkedin_to_facebook.pdfIn PDF document text
    • https://78636f1b-f2d6-4e4a-b4e1-07eac4c165d1.filesusr.com/ugd/434c97_b6f00220af7d4f1186daae3d8ec87bc5.pdf?index=trueIn 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_off0000dc21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC21 5352 bytes
SHA-256: b8068118404feaccdd62c483c0e44580805f5205f2b24a504b9e06996509c9b2
font_01_sfnt_off0000ee29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE29 11888 bytes
SHA-256: a177d429e6a47fcedc176a5a456246228d7f6fbc6b4f699c9a36c0e92cec09d7

Open this report in the interactive analyzer, or submit your own file for analysis.