Malicious PDF — malware analysis report

Static analysis result for SHA-256 d962f1f20f2215a1…

MALICIOUS

PDF

309.8 KB Created: 2020-10-27 21:05:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 0449fe112bff66a4cfbea92550c0dff5 SHA-1: 51b5e1ae97b56da0a0a31a25c1ed62f0dd106226 SHA-256: d962f1f20f2215a106a4c872d3baa5a402e5e895bfe7935cf52bc39f231ceb16
102 Risk Score

Malware Insights

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

The PDF contains a link to a redirector infrastructure, which is a common technique for delivering malicious payloads or phishing pages. The document body, though heavily obfuscated, contains text suggesting urgency and a lure related to a 'Fiora jungle guide'. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9823

Heuristics 4

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://ttraff.me/pify?keyword=fiora+jungle+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4371807/normal_5f8a7d2707c10.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390643/normal_5f8f0140013c9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5173/5448/files/craftsman_professional_27_gallon_air_compressor_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/3698/3720/files/vowewuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8491/5906/files/rofogezesojepaxozoziken.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/2324/4705/files/acids_and_bases_grade_12_notes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03d8f9f0-d574-411f-a598-dde332f89275/xajikubuduravafuku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c700887-fb45-4388-8d34-e2f27febab45/xefigadajuraxi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cf3fe3c-2ff0-4920-9200-bb5587d84ca4/1934.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04fffb91-bf7f-415d-a492-86394a69da9c/tiwovijuvuv.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/design_thinking_handbook.pdfIn PDF document text
    • https://s3.amazonaws.com/vufupu/luwagurokedurefazujir.pdfIn PDF document text
    • https://s3.amazonaws.com/sefiwegegagu/anemia_y_embarazo_oms.pdfIn PDF document text
    • https://s3.amazonaws.com/wizuluworafid/ziwin.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/cisplatin_induced_nephrotoxicity_in_rats.pdfIn PDF document text
    • https://s3.amazonaws.com/kakef/deontology_and_utilitarianism.pdfIn PDF document text
    • https://s3.amazonaws.com/daraniwekamidir/fokubumavi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8f5785b-bbcd-4ed6-8c5e-b7324b70e0d1/dizidipojitutefuguwesen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee7f8c4d-adf9-4680-b2cf-a6ce515e110c/91136890017.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6824398e-2ec1-4933-a9dd-360048988d1d/23915487490.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b98b3751-28dd-4e69-9d68-858eb2d6d59f/siwafavudojirutoleg.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_013_off00049bdc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49BDC 25204 bytes
SHA-256: 9f47cd0b4d1816ffb1a9ee73b1c7d6cf0d6143099c36090ef0d4946d9f30c86f
font_00_sfnt_off0004621b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4621B 4848 bytes
SHA-256: 8e768532f2c9855c18e7b38287473dee89a26bf4ca2d55009f4b6be942c9fded
font_01_sfnt_off000472a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x472A2 12452 bytes
SHA-256: 90cc5785aa0259467eb9693460fcee079b61d4a69f528885224ec8d85a340717

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