Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2ab9902934f3ece…

MALICIOUS

PDF

74.5 KB Created: 2020-10-26 06:24:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: b90ab776e2d0dff1185ee2968d61864d SHA-1: 3086457f2ee36688c633072bbbaeefe7d830fe50 SHA-256: a2ab9902934f3eced20b03b00aa41a645635423ad455d380ee0fa1cfafa9543c
194 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are identified as redirectors or part of link farms, suggesting a malicious intent to direct users to potentially harmful content. The ML classifier strongly flagged this PDF as malicious, and the presence of embedded links points towards a phishing or scam campaign. Although no scripts were explicitly extracted, the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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.
  • 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://ggtraff.ru/aws?keyword=speaking+in+tongues+bible+pdf In PDF document text
    • https://fimozafovobas.weebly.com/uploads/1/3/2/7/132741130/zapevakujoxapupal.pdfIn PDF document text
    • https://kidunaxu.weebly.com/uploads/1/3/1/4/131437100/7394523.pdfIn PDF document text
    • https://rivisoni.weebly.com/uploads/1/3/0/7/130739016/bisikerotofixevemop.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369786/normal_5f93dfe25cef0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369322/normal_5f887ef58a1ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366639/normal_5f904c526186d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370530/normal_5f8fc43ce18c5.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/xanebavifamopez/character_strengths_and_virtues_download.pdfIn PDF document text
    • https://s3.amazonaws.com/takateg/guzedetu.pdfIn PDF document text
    • https://s3.amazonaws.com/rexogeguxosix/econometrics_course.pdfIn PDF document text
    • https://s3.amazonaws.com/vidadaviwal/9186165512.pdfIn PDF document text
    • https://s3.amazonaws.com/xojafemori/70314674513.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c714545b-5f28-47fd-9149-c370bf628d14/21975350882.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/833a1cf6-6ad3-4d8c-98e7-2bbea5c918cd/activate_office_2016_for_mac.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/8461/4299/files/voicemail_notification_settings_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8134/4199/files/surface_area_cone_worksheet_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9155/8551/files/whatsapp_transparan_terbaru_2020_apk_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9502/4025/files/326763310.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/4702/2492/files/rigobidisutoxadinebi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/7952/3240/files/35846668926.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_off0000e731.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE731 5420 bytes
SHA-256: c260770f8dc8f8be44631f7466721c0dce973102219c81ef33e0cab123378297
font_01_sfnt_off0000f9ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9AD 10188 bytes
SHA-256: 850fda49c79cb3148bdd21c88acc9c62cd86926111e02f6698a72a58706b9523