Malicious PDF — malware analysis report

Static analysis result for SHA-256 e628bb4b3441bf14…

MALICIOUS

PDF

87.2 KB Created: 2021-03-24 08:41:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 7f864461af9f4eae3f7cb3040dbc4be2 SHA-1: ced9dcabc215e1894b9011bc85f3a6309de64ac1 SHA-256: e628bb4b3441bf144d139c5f55447064a53e699661ca5485e939be1e34f02f15
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a high-severity heuristic indicating it's a phishing lure that redirects to an external URL. The embedded URL, https://dugedepap.ru/strik?utm_term=employment+leave+rules+in+india, is identified as a potential phishing or malware distribution point. ClamAV also detected this file as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://dugedepap.ru/strik?utm_term=employment+leave+rules+in+india PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4470385/normal_6004b8af2e957.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381738/normal_5fe1347882458.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492245/normal_5feba0b552471.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366628/normal_5fce5b149e031.pdfIn PDF document text
    • http://jifarobajis.sportsontheweb.net/waped.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ae2365d-3e5e-40b4-ba81-42dcf7a795c8/85733702847.pdfIn PDF document text
    • https://s3.amazonaws.com/leributafa/habitos_de_alimentacion_saludable_para_nios.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzakifezara/mesiwevolufutokodu.pdfIn PDF document text
    • https://s3.amazonaws.com/lemerisinivum/asus_motherboard_m4a89gtd_pro_usb3_drivers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ffea918-cca4-42b6-8456-0f63a3d5a63b/wildgame_innovations_crossbow_parts.pdfIn PDF document text
    • http://sajulugebimisu.myartsonline.com/struts_2._5_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/lemefofutomapox/80018194913.pdfIn PDF document text
    • https://s3.amazonaws.com/gedesisumi/fusivaxizibixonufonifol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec286126-d873-49c9-913c-83cad75b14f7/allen_carr_weight_loss_method.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e4d5ffc-098a-48ac-b514-1c9233e2f139/janera.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b5118ff-e736-4129-b191-5dc462720433/first_alert_carbon_monoxide_alarm_screen_says_end.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f6f0359-7296-4751-9e66-c2d4f2e39d2c/got_my_life_together_quotes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc362a15-f3ed-434d-911a-108d2a35ae38/beyond_enemy_lines_2_ps4_test.pdfIn PDF document text
    • https://s3.amazonaws.com/ziwuvijevo/concrete_nouns_worksheets_grade_4.pdfIn PDF document text
    • http://vumovofun.onlinewebshop.net/tupisaxalaveku.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_off00011687.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11687 5224 bytes
SHA-256: d5099e9a76111cc65d8139eb622bce8543a1a03cd451703238aebaa694cc4cff
font_01_sfnt_off00012842.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12842 11092 bytes
SHA-256: 51db293ef3fb6d9fcdfba6908c7b7d076a7f6f37c187508dd73bcc62276a21e5

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