Malicious PDF — malware analysis report

Static analysis result for SHA-256 a072f985c4147d8a…

MALICIOUS

PDF

89.3 KB Created: 2021-03-27 14:21:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: f27503346668a850bf229a83f924dec8 SHA-1: 520f757c41612a9756b89f4387acc568518c5351 SHA-256: a072f985c4147d8a569fbb69ad0d88d22391f5a8bb876fd1b2afa35026f6cd37
96 Risk Score

Malware Insights

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

The file is a PDF document detected as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to a suspicious domain, likely intended to trick the user into visiting a phishing or malware distribution site. No scripts were extracted, but the presence of an external URI in a malicious PDF suggests a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jacksth.ru/award?keyword=data+analysis+open+source+tools+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4379837/normal_6005eb09437d9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450147/normal_5fe43a276733b.pdfIn PDF document text
    • http://dekagexagupeje.iblogger.org/kindergarten_reading_sight_words_worksheets.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458421/normal_5ffa6eda345d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366007/normal_60518550e260b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502906/normal_60059d9a6349c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/neporezofov/ms_271_stihl_price.pdfIn PDF document text
    • http://fevenubonanez.rf.gd/original_mark_sheet_of_sol_du_2014.pdfIn PDF document text
    • https://s3.amazonaws.com/fivebo/30893514078.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40b6f00c-ac91-4574-a9fc-3fceddf7f3be/how_to_thread_a_brother_sewing_machine_lx3817.pdfIn PDF document text
    • https://s3.amazonaws.com/suzixegazunow/56992140880.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6cf5588-0143-4191-ad1e-42417ca19212/xevexanavesovusasasagax.pdfIn PDF document text
    • https://s3.amazonaws.com/rejiner/hp_deskjet_5550_power_adapter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ceeead8-73a9-4b65-8dd7-6520f46cc347/46818077434.pdfIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/breast_cancer_screening_guidelines_comparison.pdfIn PDF document text
    • http://pemadoludapi.rf.gd/ensefalopati_hepatik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a7074d2-6fc5-4f40-b216-cc323c9c6fd5/hp_laserjet_1100a_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/posufij/local_guide_level_8_benefits.pdfIn PDF document text
    • https://s3.amazonaws.com/dixaleko/the_economics_of_money_banking_and_financial_markets_book.pdfIn PDF document text
    • https://s3.amazonaws.com/lolaritemukole/believer_imagine_dragons_song_video.pdfIn PDF document text
    • https://s3.amazonaws.com/nutanigonu/online_hotel_booking_software_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/tezude/who_is_behind_news_break_app.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77a554d2-77d0-4d3f-a6e3-7f96698620df/48021276769.pdfIn PDF document text
    • https://s3.amazonaws.com/rogugagatuf/dexuvovumotelur.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE94 5132 bytes
SHA-256: 39b9fc8334b33aa9baeb3ab250d7f50ab51a0713e04514e298524112983b9ad2
font_01_sfnt_off00011021.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11021 10568 bytes
SHA-256: 409e23b38cbf6c07bbe8932a53bef67635e0010ea6f396a336378696ef64ed7d
font_02_sfnt_off00013460.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13460 16060 bytes
SHA-256: 99ddc6f5858eb134f8024171ebe717cbd02485c31471b921a5021903b5272953
font_03_sfnt_off000148fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148FA 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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