Malicious PDF — malware analysis report

Static analysis result for SHA-256 aee7614f13878cfd…

MALICIOUS

PDF

84.4 KB Created: 2021-03-25 06:22:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: b6a03687f3e3614143bc06573863137e SHA-1: 6e8e7c8c0de3590d7685c55c831262364300533e SHA-256: aee7614f13878cfd5f966ce84930de70dfcd42944e592a39395f094d57972924
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, and contains a large number of external links, many pointing to disposable hosting. The document body, though heavily obfuscated, suggests a lure related to 'how to calibrate thermometer on honeywell thermostat', directing users to the URL https://maypoin.ru/aws. This indicates a phishing or SEO poisoning attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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.
  • 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://maypoin.ru/aws?utm_term=how+to+calibrate+thermometer+on+honeywell+thermostat PDF link annotation
    • https://bagubabijotete.weebly.com/uploads/1/3/4/3/134319258/lesolefefevok.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389604/normal_60200bc35dd6d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374373/normal_5fc6932016d5a.pdfIn PDF document text
    • https://morutasatosode.weebly.com/uploads/1/3/4/3/134366393/binizisolefo.pdfIn PDF document text
    • https://virenejamavik.weebly.com/uploads/1/3/4/1/134131854/7791859.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446289/normal_5feb68204b6df.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370540/normal_6008e33aca3e0.pdfIn PDF document text
    • https://kikafizujugu.weebly.com/uploads/1/3/4/0/134012642/91f618155.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/woxotopapozokev/didavuwiwuluretowoxeriv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3821c6b-b1d9-445f-9d25-61bda6687047/what_are_some_really_cool_boy_names.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5697b57f-dc4a-43da-b7dc-92fc90b0fffb/3095965049.pdfIn PDF document text
    • https://d4180a97-8dd0-4bf1-9e2f-d1b128d1a64d.filesusr.com/ugd/ae059d_e37516c2580744948038ea9330cb1dba.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dazinibonofobi/traduo_batman_arkham_asylum_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/bejeseja/sumuvugonibamenijuzujovi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/777903e7-ff64-4bbc-9f59-d879a69a5ae1/ejemplos_de_comunicacion_no_masiva.pdfIn PDF document text
    • https://69a21580-3c80-4f81-8097-1ec0bc18215d.filesusr.com/ugd/bd7df1_1bc505567db64a75b8549ff0eef41920.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab4dd93c-5fa0-4cb7-b0c8-11a11e99e5c5/84639291528.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07f93fa9-26f3-41ff-b33b-0a6e19e4fbf8/69110375584.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c43e9364-ce21-4f0b-a18c-3bd5177647e5/nivaldo_tro_chemistry_structure_and_properties_2nd_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d6fdda6-4796-4c3a-9b96-da3c391339c3/45877943939.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec70ab0c-3d3a-4d39-ac68-9a1607e78841/how_long_was_jaycee_dugard_kidnapped_for.pdfIn PDF document text
    • https://a43ab9c2-5efb-4cee-ac06-b782a0f5e207.filesusr.com/ugd/4826f5_36f08dc64d4c4dea8b86d9ab897a9af4.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC7C 5124 bytes
SHA-256: 54d0ca7793e460756e745caa971798528d24d02ef3871e296615ee52f38addbe
font_01_sfnt_off00010dc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DC1 11248 bytes
SHA-256: e63516277d601c2b0f598f2bc30c327449aa791cd7b59005e123e862e4adbedd
font_02_sfnt_off0001336e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1336E 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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