Malicious PDF — malware analysis report

Static analysis result for SHA-256 add059b17def5f99…

MALICIOUS

PDF

69.3 KB Created: 2021-02-03 00:44:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 121212c440655bd32e92785096c54c8a SHA-1: 33fb47541a520cf4a55640e3820cb336475da6c8 SHA-256: add059b17def5f9993c4942087e3833d68845159356976b4c8e7a4a45eb640c2
216 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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://jottigo.ru/aws?utm_term=disgaea+5+power+leveling+guide PDF link annotation
    • http://dafusunefu.iblogger.org/eset_mobile_security_antivirus_apkpure.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475872/normal_6019cc72aa0db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443574/normal_5fd63e0f8584c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452846/normal_5fda0490dfe0b.pdfIn PDF document text
    • https://giwulotasika.weebly.com/uploads/1/3/1/4/131411199/resawagosovesak_tanaridure.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378149/normal_5fef4e4ad6b51.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474223/normal_6018bbd40634d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459937/normal_5ffba5fe4ac95.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367919/normal_60098628401c8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421768/normal_5feb88f661ec7.pdfIn PDF document text
    • http://vavoferidedodif.66ghz.com/john_coltrane_blue_train_sheet_music.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://beninoduvewer.epizy.com/49388514117.pdfIn PDF document text
    • https://s3.amazonaws.com/gedimuta/wilanifiwurovu.pdfIn PDF document text
    • https://s3.amazonaws.com/rizoli/brlps_jeevika_answer_key_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/penefelomiju/oracle_11g_installation_guide_for_redhat_linux.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_off0000d235.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD235 5404 bytes
SHA-256: 0fcaf788775353e733b8b4b0b1826cd34dcae582d68b9ec99d33744e66e6b098
font_01_sfnt_off0000e4c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4C5 10448 bytes
SHA-256: b09a97d13368657c7af9fb9e684ffbc5fbe660db641c584f1f48590904e9b738