Malicious PDF — malware analysis report

Static analysis result for SHA-256 a77427c5c3eb0284…

MALICIOUS

PDF

76.6 KB Created: 2021-03-17 21:18:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5d1fae442fac207d25a8a4c9ba41da94 SHA-1: bc010a732564bf43a175339740d48d7a719e3512 SHA-256: a77427c5c3eb02841165ac0c135dc374d471a7d4fcb57bf99591c19dbed46cf9
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site. The document body, though partially corrupted, contains text related to car value, suggesting a lure to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://mezovuduw.ru/aws?utm_term=what+is+a+2014+jeep+grand+cherokee+overland+worth
    • https://static.s123-cdn-static.com/uploads/4494677/normal_5ff9d98e787a5.pdf
    • https://cdn.sqhk.co/jimikafede/jfdaC3K/89320858788.pdf
    • http://metoxegid.mygamesonline.org/rikoko.pdf
    • https://cdn-cms.f-static.net/uploads/4484375/normal_604352f3045d5.pdf
    • https://cdn.sqhk.co/pajerelo/yhikyje/xekavavavudusago.pdf
    • https://cdn-cms.f-static.net/uploads/4416490/normal_603523af26121.pdf
    • https://cdn-cms.f-static.net/uploads/4474752/normal_6016c8c6bdb95.pdf
    • http://rakomakefike.iblogger.org/liwuxejokigulute.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://zelogano.epizy.com/atmel_flip_user_manual.pdf
    • https://uploads.strikinglycdn.com/files/a9df138b-372d-43c3-8a6a-77cc938f63e1/nujomene.pdf
    • https://uploads.strikinglycdn.com/files/b8ec4d57-b777-45d0-ac05-35ea497ea5ae/psychological_tests_for_anxiety_and_depression.pdf
    • https://uploads.strikinglycdn.com/files/83986ba6-8121-47c4-9cff-3cd71c6ecad3/nazasipazuxodesina.pdf
    • http://vagaxalelevirot.epizy.com/78709661291.pdf
    • http://pidodexogejax.myartsonline.com/elements_and_principles_of_design_in_fashion_powerpoint.pdf
    • http://sulopemod.epizy.com/islamic_baby_names_with_meaning_in_urdu_download.pdf
    • http://wepinipinalojud.epizy.com/4627654046.pdf
    • http://laverowe.epizy.com/31671146559.pdf
    • http://ranitirunom.myartsonline.com/four_rules_a_network_protocol_should_have.pdf
    • http://zudupaxub.myartsonline.com/89289982331.pdf
    • https://uploads.strikinglycdn.com/files/b9520a5c-b8f2-499e-ba2c-577761bd87cf/sex_and_the_city_2008_box_office.pdf
    • http://zetikof.epizy.com/19641944530.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb04.bin
80d59e37d6f8869ec92db8b396cd01e77fce4dd7fbac2a21dc7c4c9895ca00e7
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB04 6052 bytes
font_01_sfnt_off0000ffc6.bin
3dc0ea1d0cf49964849f9e2baadf105ce9464cc2e286d28b9f83c997acab49bc
pdf-font-stream PDF embedded font (sfnt) at offset 0xFFC6 10896 bytes