Malicious PDF — malware analysis report

Static analysis result for SHA-256 324c1661e7c06512…

MALICIOUS

PDF

99.6 KB Created: 2021-03-12 20:27:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: e4dbf92d06cdd1dfee20fd1dda6d4e81 SHA-1: 359a94238703901d81964a1d55b835746ee54bf8 SHA-256: 324c1661e7c0651214b8a879db0d1f88b7487b6c9c2ca0c57742f3dbaa91101a
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded URLs, with one specifically appearing as a search result for a common technical problem, likely to trick users into clicking. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests a large number of links hosted on disposable domains, further supporting a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://resalured.ru/wb?keyword=why%20is%20my%20wifi%20not%20working%20on%20samsung%20s7 PDF link annotation
    • http://jofipifemu.medianewsonline.com/62558087661.pdfIn PDF document text
    • https://cdn.sqhk.co/gatezoru/Ejgxp9r/85227522454.pdfIn PDF document text
    • https://cdn.sqhk.co/desiketomasu/hgMhhZ2/71041231878.pdfIn PDF document text
    • http://fazoluniguket.iblogger.org/in_the_mood_for_love_soundtrack_analysis.pdfIn PDF document text
    • https://cdn.sqhk.co/fofateze/euibjcd/lock_screen_rotation_on_ipad_2.pdfIn PDF document text
    • http://fadewujetenuve.mywebcommunity.org/rosuxok.pdfIn PDF document text
    • http://motarojetox.sportsontheweb.net/greek_god_family_tree_chaos.pdfIn PDF document text
    • http://gukevipagopu.mywebcommunity.org/nimakilotemije.pdfIn PDF document text
    • http://gidujoluj.mypressonline.com/lebexuzigawiluwepizaxube.pdfIn PDF document text
    • https://cdn.sqhk.co/pulovafafita/geieigS/diy_cloth_face_mask_pattern_printable.pdfIn PDF document text
    • http://wobafobigo.mywebcommunity.org/dokafuwoge.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zarenubopopo.epizy.com/mobepuf.pdfIn PDF document text
    • http://povalimokuwov.rf.gd/dyson_dc35_filter_switch.pdfIn PDF document text
    • https://a2c67b61-a01d-4053-b7ad-f1487bca8054.filesusr.com/ugd/24853a_0bfc84e4128f4abe8b5a01e2af3f926b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sedowedi/vujawidi.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/75296914643.pdfIn PDF document text
    • https://be08d7d4-326a-4801-be9d-4496af17a43b.filesusr.com/ugd/d31907_90e7d1e62fe84ff2825057d08f0372c3.pdf?index=trueIn PDF document text
    • https://7ef5d8b8-74ac-4e0a-b0a0-fa61ca6462a8.filesusr.com/ugd/23e9be_d1b229d31afb43bd98936c5170b589f8.pdf?index=trueIn PDF document text
    • http://nogapovo.rf.gd/spanish_phonetic_alphabet_translator.pdfIn PDF document text
    • https://4adff18d-dc39-4349-be2c-eeb12737f1cb.filesusr.com/ugd/9117e0_2ddfc45a54334f109d8820e2fe2eaaa2.pdf?index=trueIn PDF document text
    • http://faxanudof.epizy.com/canadian_solar_400w_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
    • 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_off00013070.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13070 5500 bytes
SHA-256: 9aff3788c0d92044f3f7296439b2e3a709c6deddb03f796209d5d709e1e19ca2
font_01_sfnt_off00014327.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14327 10816 bytes
SHA-256: 57a9899d3bea0cbba7b47a0bc0b9713a740bbe6e4e65f0f7db7d70b937a04f93
font_02_sfnt_off00016832.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16832 16924 bytes
SHA-256: 9a88d616ba3b1f451f05a3fcb42ea462173e6f10eeee9d877a40108eac92501e

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