Malicious PDF — malware analysis report

Static analysis result for SHA-256 18b62cbda1bf18f6…

MALICIOUS

PDF

83.8 KB Created: 2021-02-20 02:41:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 237deb9de65dd76d43c4f180a83eacd1 SHA-1: 74f34ac9d574326ad5bc45553fd4aaf2dbbe9598 SHA-256: 18b62cbda1bf18f6721bfe164f4120eab7dd1ecca69ca19ba90757dd91546573
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or malware distribution intent. The document contains numerous embedded URLs, including one pointing to a printer driver search, suggesting a lure to download potentially malicious software. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports the idea that the document is part of a link farm designed to obscure malicious destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://seumenha.ru/wb?keyword=hp%20laserjet%203055%20printer%20scanner%20driver%20for%20windows%2010%2064%20bit PDF link annotation
    • https://cdn.sqhk.co/mevojazix/ibgfWLv/coach_mobile_homes_for_sale_under_5_000.pdfIn PDF document text
    • https://manatelagaren.weebly.com/uploads/1/3/1/4/131437493/parejetilo.pdfIn PDF document text
    • https://ginuwedisifixel.weebly.com/uploads/1/3/4/7/134744372/9348927.pdfIn PDF document text
    • https://cdn.sqhk.co/giganopof/npjcvTV/lukevalukikekep.pdfIn PDF document text
    • https://cdn.sqhk.co/boxadiweteve/id30Jgi/hedgehog_wallpaper_for_bedrooms.pdfIn PDF document text
    • https://jurujixomegisi.weebly.com/uploads/1/3/4/7/134745805/lokogifo.pdfIn PDF document text
    • http://olx-delivery.cc/xavedokepefonatumuredufb9m4.pdfIn PDF document text
    • http://ek-arenda.ru/dvdms_portal_biharcqutp.pdfIn PDF document text
    • http://hook-up.fun/sutaninesezatoruzanodejqjg5q.pdfIn PDF document text
    • http://loxapul.iblogger.org/backcountry_tamil_dubbed_movie.pdfIn PDF document text
    • http://helplnstagramcontact6088756.com/gods_plan_for_marriage_quotes8wg54.pdfIn PDF document text
    • https://cdn.sqhk.co/miburixegapu/hejjjdR/xenumabuxej.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
    • http://welididoseburiv.epizy.com/larousse_french-_english_dictionary_free.pdfIn PDF document text
    • http://widafasamuj.epizy.com/mikexitatumonorizevilozen.pdfIn PDF document text
    • http://badokelo.rf.gd/40755682732.pdfIn PDF document text
    • http://befakugidutoj.rf.gd/34400925461.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxexi/36855421614.pdfIn PDF document text
    • https://s3.amazonaws.com/dazovosugev/37471268567.pdfIn PDF document text
    • https://s3.amazonaws.com/folexapurilowe/kefifazimafamovi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA33 5992 bytes
SHA-256: 5dc40f63f1abefaf8d89bc5951da0dfafcb085e85d24dedf182b65226bb2b7b4
font_01_sfnt_off00010ead.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EAD 10700 bytes
SHA-256: d0bd535c59166333011ff9b1bd3cb54507cb219c36157441fcb962535617ec3c
font_02_sfnt_off0001334d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1334D 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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