Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f3bfcff5c7f3a4d…

MALICIOUS

PDF

99.5 KB Created: 2021-03-11 15:23:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 86f810508c64138e36cbaf47268f3b1e SHA-1: 1140d95bca6df241c9bcf2a602103fb46683e6ce SHA-256: 1f3bfcff5c7f3a4dad94d57594c05fdb66cdfc8df78daaaa3d2e2736094536b9
196 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying a link farm and a redirector to 'https://midufefew.ru/wix?keyword=3+follicles+iui+success+rate'. This URL is likely used for phishing or to serve malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://midufefew.ru/wix?keyword=3+follicles+iui+success+rate PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4385887/normal_5ffaaf3b869bb.pdfIn PDF document text
    • https://pemolopudamas.weebly.com/uploads/1/3/4/7/134753943/kuwuvufejizotiz.pdfIn PDF document text
    • https://vajunepiw.weebly.com/uploads/1/3/2/6/132681590/bupomiwu-poxoruxepafogap-fulev-tipewamagok.pdfIn PDF document text
    • http://pigigozoruda.mypressonline.com/35647980277.pdfIn PDF document text
    • https://cdn.sqhk.co/ravuviwidi/jfBiddl/xebanosuzegi.pdfIn PDF document text
    • https://cdn.sqhk.co/vibebexez/ieFichc/25739139836.pdfIn PDF document text
    • http://gesetaxoxu.sportsontheweb.net/best_friend_synonyms_in_french.pdfIn PDF document text
    • https://wugizagopa.weebly.com/uploads/1/3/5/3/135311922/263c47fd380.pdfIn PDF document text
    • https://cdn.sqhk.co/gotubosif/eidwjaC/razalitikeweva.pdfIn PDF document text
    • http://labifovejes.mypressonline.com/gumasexiki.pdfIn PDF document text
    • https://pezawixutumef.weebly.com/uploads/1/3/1/1/131164564/vowaxuzawumizerovas.pdfIn PDF document text
    • https://cdn.sqhk.co/kewawukufiju/uiiYheF/85361163642.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369165/normal_60177d9c20d20.pdfIn PDF document text
    • https://juwexulomo.weebly.com/uploads/1/3/4/3/134385858/2098179.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/fazujo/james_baldwin_a_talk_to_teachers_citation.pdfIn PDF document text
    • https://s3.amazonaws.com/jobavo/catholic_bible_tagalog_apk.pdfIn PDF document text
    • https://3caa4030-7dd6-4be4-8a8a-e1981c45b3cd.filesusr.com/ugd/704988_aaeb1e177733452092afeaecf9136f03.pdf?index=trueIn PDF document text
    • https://181f3bdf-810f-4c34-abb3-9f3362228cd6.filesusr.com/ugd/30415f_0262da4903b94c04aa4da5b3ec56ada5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/titugome/xarogafudedamapuxolaruni.pdfIn PDF document text
    • https://36c7e617-1221-4173-b726-d5bce2878801.filesusr.com/ugd/610d21_5f7e21dd72ec401a8d1942eafbe1adc0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vonutavekip/69636878137.pdfIn PDF document text
    • http://zijiwaras.onlinewebshop.net/vokuxupo.pdfIn PDF document text
    • https://6a8c3f3f-5248-4e80-80e0-4bf2c04f72bc.filesusr.com/ugd/8b2c09_0825383091974b618959a66b0365c06e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tobovunoberiki/narrative_literature_review_template.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001353c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1353C 4944 bytes
SHA-256: a9ce559ab3b731cde54ab76227acddb75514e737c2d79027d0df5884595df232
font_01_sfnt_off00014618.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14618 10752 bytes
SHA-256: 12695c4e2c18f85959e7a06832559d5de4d9de45307f721b1e31b4e9db49de9c
font_02_sfnt_off00016ae1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16AE1 16148 bytes
SHA-256: aabbb95e4258a1bccfe6759090a0a8b97a33e8154131110566ffb2eaa8fdb080

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