Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c448d5cda520f95…

MALICIOUS

PDF

72.1 KB Created: 2021-03-02 06:46:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 1d8fcb022abaa8031813e4f048244db8 SHA-1: ae7eb0c36294842b6d5465de124b8c258c4856f4 SHA-256: 2c448d5cda520f952d9e4b3ee5b6f6502764bfad332ca4671b5d333d4498c707
204 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://fokemale.ru/aws?utm_term=fujitsu+scansnap+ix500+installation+instructions PDF link annotation
    • https://xeganixirutor.weebly.com/uploads/1/3/4/5/134508666/8615188.pdfIn PDF document text
    • http://kogutojoveso.mywebcommunity.org/69611509941.pdfIn PDF document text
    • http://aov.one/81540525187gyasc.pdfIn PDF document text
    • http://hookup154.online/polaxedofoxudabiw7trc.pdfIn PDF document text
    • https://gosawopidelogeb.weebly.com/uploads/1/3/4/7/134714887/1597763.pdfIn PDF document text
    • http://mapotilij.mygamesonline.org/g_shock_watch_shop_near_me.pdfIn PDF document text
    • http://blockingscenery.com/vevezadefoguxinusuwlabhn.pdfIn PDF document text
    • http://fitokaps.xyz/kings_of_war_historicalznu8k.pdfIn PDF document text
    • http://xbet1.fun/how_many_50_shades_of_grey_movies_are_there_on_netflix45ch1.pdfIn PDF document text
    • http://keto-menu.online/331256108991pllv.pdfIn PDF document text
    • https://zamamuxito.weebly.com/uploads/1/3/4/2/134234866/rabofedamifipoti.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/vezumobigodub/org._apache._commons._lang_jar_maven.pdfIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/spring_framework_reference_documentation_5._1.pdfIn PDF document text
    • https://s3.amazonaws.com/rurosaveruk/how_many_stitches_per_inch_crochet.pdfIn PDF document text
    • https://s3.amazonaws.com/gizonukorad/pulse_oximeter_sensor_datasheet.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_off0000dda3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDA3 5292 bytes
SHA-256: 1b334e2735618e018858831969ae2fbe13c0355216cb7ce602a0a3fbb665ca60
font_01_sfnt_off0000efc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFC5 10440 bytes
SHA-256: 826fe463bd33215780be1bebc0af5e0321f767c252c42a98c63f4fc1a5e1c06e