Malicious PDF — malware analysis report

Static analysis result for SHA-256 62b19b1b340f06a0…

MALICIOUS

PDF

83.0 KB Created: 2021-03-23 14:59:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: fab669bc106fd61868f78ae91bbe4335 SHA-1: b7230e2f0ab9e04a6bb5ae1162aa0496113412f9 SHA-256: 62b19b1b340f06a0655f0470035ee563c85c471599b21368ddbc2121bcfb2ea8
194 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to known malicious infrastructure, identified by multiple heuristics including PDF_MALICIOUS_REDIRECTOR_LINK and ML_NYX_PDF_MALICIOUS. The ClamAV detection further confirms its malicious nature as a phishing trojan. The document body, though heavily obfuscated, appears to be a lure related to technology, aiming to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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.
  • 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=tecnolog%25C3%25ADa+de+punta+en+informatica In PDF document text
    • https://cdn-cms.f-static.net/uploads/4393483/normal_6055bc58cfdd9.pdfIn PDF document text
    • https://lujovimujesami.weebly.com/uploads/1/3/4/0/134019161/lawozusi.pdfIn PDF document text
    • http://huseyincanx.com/what_are_the_graces_of_the_holy_spirit5zd67.pdfIn PDF document text
    • http://talkme-news.info/stick_war_2_unblocked_google_sitesf9d6z.pdfIn PDF document text
    • http://kpovli.ru/stability_of_complex_ions_chemguideyuspn.pdfIn PDF document text
    • http://buyervannakupitvsem.xyz/my_bloody_life_as_a_latin_kingh6qgt.pdfIn PDF document text
    • https://finedogu.weebly.com/uploads/1/3/4/7/134749629/7808321.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388432/normal_603a7fa422247.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459027/normal_5fc6da0d47ed9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465255/normal_6034627e4a376.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476427/normal_5fc95fd345502.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386365/normal_5fc69111d853d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494893/normal_600f05f5b8dfc.pdfIn PDF document text
    • https://boxoxezerutevok.weebly.com/uploads/1/3/4/3/134317212/lapolegiteru-vewipabo.pdfIn PDF document text
    • http://newser.site/fimilofedamt8533.pdfIn PDF document text
    • http://naturfresh.fun/60723896772c76h9.pdfIn PDF document text
    • https://tatedamemod.weebly.com/uploads/1/3/0/7/130739791/7045000.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491169/normal_5fd1fc914b819.pdfIn PDF document text
    • http://hookup153.fun/77135524640rk410.pdfIn PDF document text
    • https://tarutugiwom.weebly.com/uploads/1/3/5/3/135326066/texexu_zesebeji_dawim_tadova.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/sabegokek/staffing_agency_agreement_template.pdfIn PDF document text
    • https://s3.amazonaws.com/woxewiwupir/348823292.pdfIn PDF document text
    • https://s3.amazonaws.com/gidibesuxi/bodas_de_sangre_translation.pdfIn PDF document text
    • https://s3.amazonaws.com/borokegujuzero/vuvemakapetetesawoz.pdfIn PDF document text
    • https://s3.amazonaws.com/xesigeze/kemiven.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f581.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF581 5180 bytes
SHA-256: 169c7868b0371a2ef13ad466f85514bbb4e5f7e2701e2ed00bd9f2d94781d9f4
font_01_sfnt_off0001070c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1070C 11840 bytes
SHA-256: 179da972a21efeb103ef1498e1b8f669892e2bce9227445570d130ed03fc99ea
font_02_sfnt_off00012da2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DA2 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361